Ostrea virginiana, Gmel. Abundant in Tampa Bay. Osteodesma hyalina, Con.. Abundant in Tampa Bay and lives

as far north as Massachusetts.

Periploma inequivalvis, Lam. Rare. Bay shores.

Pecten concentricus, Say. Common. catus, Say. Common. Mullet Key.

Bay shores.-P. dislo

Pinna Common. Mullet Key and Tampa Bay. It has distant series of long, thick, remote, tubular spines. I cannot refer to any of the descriptions or figures I have seen.-P. floridana, Con. Mullet Key. Rarely entire.

Plicatula ramosa, Lam. Common. Egmont Key.

Solen ensis, Lin. This is the variety minor which lives as far north as the Carolinas. The major is limited to the coast north of this latitude. This fact has led me to believe that two species are designated by the name of ensis.

Solecurtus fragilis, Van. Common. Egmont Bay. I think this species is distinct from S. fragilis, but in deference to the opinion of an eminent conchologist I have classed it as a variety of that species.

Tellina punicea, Lin. Mullet Key.-T. acuta, Wood. Rare. Mullet Key.-T. lateralis, Say. Common. Bay shores. This shell also inhabits St. John's river, East Florida, and is said to inhabit Africa and California.-T.. A thin sub-triangular species very common in Tampa Bay.—T. Two or three undetermined species. Key shores.

Venus cancellata, Lam. Next to Donax variabilis the most abundant shell on Mullet Key.-V. punctulata, Valen. Egmont Key.-V. Mortoni, Con. Abundant in Tampa Bay, a gigantic species found also in Charleston harbor. The young shell is covered with elevated laminæ and generally has angulated markings, resembling those of V. notata. One specimen of considerable size has distinct distant broad fulvous radii. The species I believe never has a purple spot in the interior so general in specimens of V. mercenaria. The size is generally about six and a quarter inches in length and five and a half inches in height, and the weight of the shell without the animal about four pounds. It resembles the fossil V. permagna, Con., but that species has much more robust concentric lines or ridges, and attains a rather larger size.-V. cuneimeris, Con. Bay shores; common.

Univalves.

Acteon floridanus, Con. Bay shores.

Bulla succinea, Con. Common. Bay shores.-B. - Common. Mullet Key.

Bullina canaliculata, Say. Bay shores.

Cancellaria cancellata, Lam. Rare. Mullet Key.

Cerithium protextum, Con. St. Joseph's Bay.-C. septemstriatum, Say. Lignum Vitæ Key, E. Florida; Key West.-C. eriense, Kiener, (C. nigrescens? Minke.) Common in Manatee river. It is a singular error of Kiener's to give Lake Erie as the habitat of a species of Cerithium. It is found on the Atlantic Keys of Florida.-C. dislocatum, Say. St. Josephs Bay.-C. Two undetermined species. Egmont Key.

Crepidula fornicata, Lam. Common. Mullet Key.—C. maculosa, Con. Common. Mullet Key.-C. aculeata, Lam. Common. Inhabits Oyster beds in Tampa Bay.-C. unguiformis, Lam., (plana, Say.) Key shores.

Dentalium eboreum, Con. Southern coast of Florida.-D. coarctatum,* Lam., (D. gadus, Sow.) A single living specimen came up on the lead in deep water.

Fulgur perversus, Lam. Common. Bay shores.-F. pyruloides, Say. Common. Bay shores. The genus Fulgur of Montford is identical with Pyrula, Lam., and his priority by date of many years anterior to Lamarck's An. sans Vert., though the name of Pyrula is generally adopted by conchologists. It would be useful to science, if some uniform rule were established with regard to certain authors, and either all Montford's genera rejected, or acknowledged where his names have priority in date of publication. Pyrula ficus and its congeners have been separated by Sowerby from the other members of the genus Pyrula, of Lamarck, retaining the name, whilst Rousseau has subsequently named it Ficus. The former would be preferable, as having long been in use, and not like the latter preoccupied in Botany, if Fulgur should be retained. If not retained, then the original name of Pyrula will revert to P. canaliculata and its congeners. Rous

seau has described the animal of Pyrula ficus, and shown that it has more affinity for Harpa and Dolium, than for other species of Lamarck's genus Pyrula. In exterior characters and general appearance, the animal of Say's P. papyracea bears no resemblance to that of Fulgur perversus and its congeners. It is not operculated, and spreads a very singular mantle over nearly the whole shell. The mode of excluding their young in a spiral string of chambers is peculiar to the P. perversa, pyruloides, carica and canaliculata, which constitutes Montford's genus Fulgur.

Fasciolaria trapezium, Lam. Common. Bay shores.-F. distans, Lam. Common. Mullet Key and Bay shores.-F. tulipa, Lam. Common. Mullet Key and Bay shores.

Fusus perrugatus, Con. Manatee river. Fusiform, with remote longitudinal ribs, and large prominent revolving lines alternated with a fine line; whorls longitudinally rugose, upper half flat and oblique; aperture rather more than half the length of the shell, purple within; labrum striate; color of the exterior cinereous. Proportionally wider than F. cinereus, with fewer and larger ribs and lines.

Littorina littorea, Say. Bay shores.-L. (Phasianella) angulifera, Lam. Abundant on grass, bushes and trees on the Bay shores.

Murex ostrearum, Con. Mullet Key.-M. cellulosa, Con. Inhabits oyster beds in Tampa Bay.-M. tampaensis, Con. Inhabits oyster beds in Tampa Bay.

Marginella conoidalis, Kiener. Abundant. Bay shores.-M. succinea, Con. Rare. Bay shores.-M. albilabris, Con. Rare. Bay shores.

Monodonta,

Tampa Bay. Common.

Melampus bidentatus, Say. Common. Bay shores.

Melongena corona (Fusus) Lam. Common. Bay shores. This shell has all the characters of the genus Melongena.

Natica duplicata? Say. Mullet Key and Bay shores.-N. canrena,* Lam. Very rare. Egmont Key.

Neretina (Theodorus) reclinata, Say. Manatee and Hillsborough rivers, Tampa; Mobile, Alabama.

Oliva litterata,* Lam. Common. Key shores, living a few inches deep in the sand, and readily found by its trail on the surface.-O. mutica, Lam. St. Joseph's Bay.. Its habits are the

same with the preceding.-O. anazores. Southern coast of Florida.

Ovulum aciculare, Lam. Very rare. Tampa Bay.
Patella,

Pleurotoma, a small black tuberculated species.
—P. —. Small; longitudinally ribbed; pale.

Tampa Bay.

Tampa Bay.

Pollia tincta, Con. Inhabits a sand bar at the entrance of Manatee river.-P. cancellaria, Con. Ship Island.

Pyrula papyracea, Say, (genus Ficus, Rousseau.) Mullet Key. Common.

Pyramidella alveata, Con. Rare. Bay shores.

Pyrena scalariformis, Say. Common. Inhabits pools on the Keys.

Ranella caudata, Say. Rare. Mullet Key.
Strombus pugillus. Common. Mullet Key.

Triton lineolatum, Con. Bay shores.-Truncatella,

Bay shores.

Turbo castaneus. Common. Mullet Key.

Trochus tampaensis, Con. Bay shores.

Voluta Junonia. Very rare.

Egmont Key.

Vermetus lumbricalis, Lam.

Mantee river.

Multivalves.

Balanus ovularis, Lam.

Coronula testudinalis, Sow. On the green turtle in Tampa Bay. Pholas costata. Rare. Mullet Key.

Teredo navalis, Lin. Common. Tampa Bay.

In the above catalogue the Miocene species are indicated by an asterisk.

Although the proportion of univalves and bivalves is nearly equal as to species, yet the bivalves far outnumber in quantity the former; and this is the case also in the Tertiary deposits. I had remarked this fact years ago, and alluded to it in my publication on the Miocene fossils. It holds good on every part of the coast I have visited, but in the bays, lagoons and estuaries I found the proportion of univalves much larger than on the sea beach.

The land shells about Tampa are Polygyra plicata, P. septemvolva, Glandina truncata, and a species of Pupa. On Lignum Vitæ Key, E. Florida, I found the same Polygyra, with Achatina fasciata and Succinea campestris.

ART. XXXVII.-Descriptions of new species of Organic Remains from the Upper Eocene Limestone of Tampa Bay; by T. A. CONRAD.

BULIMUS.

Bulimus floridanus.-Ovate-acute, narrow; whorls 6? finely striated obliquely; spine elevated, longer than the aperture, whorls convex; body whorls with an impressed line which margins the suture; aperture narrow, subovate, labrum and labium reflected; base with a deep channel behind the reflected labium.

This is the only fossil land shell yet discovered in an American tertiary formation. Very few species of this genus exist in North America, and they are all limited to the southern portion of the Union. The B. floridanus is very dissimilar to any of these, being much less ventricose and having more affinity with the group constituting the genus Partula.

BULLA.

Bulla petrosa.-Oval, destitute of stria? summit oblique.

Ballast Point, Tampa Bay. Rare.

NUMMULITES.

Nummulites floridanus.-Discoidal, diameter through the middle of moderate width; volutions about 3 in number; surface with minute revolving lines.

Occurs with the preceding. Abundant. It belongs to the subgenus Assilina, D'Orbigny.

Cristellaria rotella.-Discoidal, with impressed radii; middle of the anterior side with a sudden depression. Abundant. Occurs with the preceding.

This small fossil can be distinctly seen without a magnifier, and some specimens are large enough to shew the impressed lines. It closely resembles a species of the Paris Eocene. By breaking the rock into small fragments, specimens will fall out entire.

VENUS.

Venus penita.-Cuneiform, concentrically striated, the lines strong anteriorly, posteriorly less distinct, posterior side produced, compressed, extremity angulated; ligament