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Collema palmatum, Ach., 283.

plicatile, Ach., 281.
pulchellum, Ach., 283.
pulposum, Ach., 281.
pustulatum, Ach., 282.
saturninum, Ach., 284.
tenax, Ach., 282.

tunæforme, Ach., 283.
Collemaceæ, 281.
Collemeæ, Fr., 281.
Comet, direct computation of the orbit of, 332.
Comet, De Vico's fourth, 39.
Comet of De Faye, 297.
Comet of Lexell, 296.
Comet of March 4th, 1847, 69.
Comet of Mauvais, 169.
Comet of Miss Mitchell, 183.
Comets of 1845 and 1846, 17.
Comets, telescopic, medal for discovery of, 301.
COMMUNICATIONS from

Agassiz, Louis, 43, 180, 342.
Andrews, S. P., 45, 51.
Bigelow, Henry J., 39.
Bigelow, Jacob, 184.
Bond, G. P., 300, 326, 332, 342.
Bond, W.C., 5, 14, 17, 19, 20, 21, 50, 69, 70, 103, 110, 165, 168,

169, 170, 175, 182, 184, 325, 327.
Caswell, J., 56.
Dana, James D., 149.
Emerson, George B., 23. .
Everett, Edward, 1, 164, 178, 296, 301.
Gillis, Lieutenant, 300.
Gould, B. A., Jr., 305.
Gray, Asa, 46.
Henry, Joseph, 168.
Horsford, E. N., 302.
Hunt, J. C., 44.
Jackson, C. T., 43, 56.
Leverrier, M., 163, 296.

Liebig, J., 163, 302.
Mitchell, William, 329.
Nichol, J. P., 300.
Owen, Richard, 178.
Paine, Mr., 300.
Peirce, Benjamin, 36, 39, 41, 57, 65, 144, 185, 285, 286, 295, 300,

305, 331, 332, 338.
Schumacher, H. C., 301.
Strong, Theodore, 129.
Sullivant, William S., 35.
Teschemacher, J. E., 179.
Tuckerman, Edward, 195.
Walker, Sears C., 146, 285, 331.
White, Daniel A., 38.
Williams, John B., 158.
Wyman, Morrill, 185, 307.
Compositæ, new, from Texas, 46.
Coniocybe, gen., Fr., 198, 273.

nigricans, Fr., 273.
Conotrema, gen., Tuckerm., 199, 278.

· urceolatum, Tuckerm., 278.
Cornicularia, Fr., 201.
Corticolæ, 259, 279.
Crustacea of the United States Exploring Expedition, 149.
Cyclopidæ, fam., 150.
Cyclops, gen., 150.

Brasiliensis, Dana, 150.
curticaudus, D., 151.
MacLeayi, D., 151.
pubescens, D., 151.

Vitiensis, D., 152.
Cyprinoids, distinctive characters of the family, 342.

D.

Dana, James D. Crustacea of the United States Exploring Expedi-

tion, 149.
Donations to the Library, 3, 36, 42, 155, 181, 343.
Dufourea, Fr., 203.

Eclipse, solar, of May, 1845, 19. Of April, 1846, 20.
Emerson, George B. Report on phonotypy, 23.
Endocarpaceæ, Fr., 199, 274.
Endocarpon, gen., Hedw., 199, 274.

fluviatile, DC., 275.
lætevirens, Turn., 275.
miniatum, Ach., 274.
Muhlenbergii, Ach., 275.

pusillum, Hedw., 275.
Ephebe, gen., Fr., 281, 284.

pubescens, Fr., 285.
Ephebideæ, 281, 284.
Ether, inhalation of, 39, 56.
Eulogy on Hon. John Pickering, 38.
Everett, EDWARD. On the number of supposable undiscovered

planets in our system, 178.
Evernia, gen., Ach., 197, 201.

arctica, Rich., 203.
divergens, Fr., 202.
furcellata, Fr., 201.
furfuracea, Mann., 204.
jubata, Fr., 202.
ochroleuca, Fr., 202.
prunastri, Ach., 204.
ramulosa, Hook., 203.

vulpina, Ach., 203.
Experiments in ventilation, 312.

Faye's comet, 297.
FELLOWS.

Andrews, S. P., 36.
Bacon, John, Jr., 51.
Bigelow, Henry J., 3.
Bond, George P., 164.
Desor, Edward, 302.
Eliot, Samuel A., 164.

Engelmann, George, 36.
Gould, Benjamin A., Jr., 164.
Gray, Horace, 163.
Horsford, Eben N., 163.
Jackson, Charles, Jr., 302.
Lawrence, Abbott, 185.
Lee, John C., 163.
Loring, Charles G., 185.

Putnam, George, 185.
Fish, blind, of Mammoth Cave, 180.
Flesh, composition of, 163.
Flora of later miocene of Europe and the existing Flora of North

America compared, 43.
Flora, orbit of, 305.
Formulæ for the perturbations of Neptune's longitude and radius

vector, 286.
Fossil seeds, 179.
Fuscescentes, Fr., 240.

Geræa, gen., Torr. & Gray, 48.

canescens, T. & G., 49.
Glaucescentes, Fr., 217, 239.
Gould, B. A., Jr. The orbit of Flora, computed at Göttingen, 305.
Granulosæ, Fr., 259.
Graphidaceæ, Fr., 198, 261.
Graphis, 268.
Gray, Asa. On new Compositæ from Texas, 46.
Gun-cotton, 43.
Gyalecta, gen., Ach., 197, 235.

cupularis, Schær., 235.
Gymnocarpi, Schrader, 197.

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Harpacticus sacer, D., 153.

virescens, D., 152.
Harpactidæ, fam., 152.
Hepaticology of North America, 35.
Herschel, nebulæ of, 326.
HORSFORD, E. N. List of sweet bodies, and their formulæ, 302. On

sour bodies, 304. On bitter bodies, 305.
Hunt, J. C. Meteorological observations made at St. Michaels,

Azores, 44.

1.

Imbricaria, Fr., 216, 217.
Institution, Smithsonian, 168, 185.

J.
Jupiter, planet, observations on, 325.
Jupiter, third satellite of, 327.

K.
Keerlia bellidifolia, G. & E., 47.

L.
Language, Chinese, 45, 51.
Language, Siamese, on, 56.
LASSELL's satellite of Neptune, 184, 295.
Lecanactis, gen., Eschw., 198, 269.

impolita, Fr., 269.
Lecidea, gen., Ach., 198, 255.

albo-atra, Schær., 259.
albo-cærulescens, Fr., 256.
arctica, Sommerf., 260.
atro-alba, Ach., 257.
candida, Ach., 255.
confluens, Schær., 258.
contigua, Fr., 257.
dolosa, Wahl., 260.
enteroleuca, Fr., 259.
flavo-virescens, Fr., 256.

fusco-atra, Fr., 258.
VOL. I.

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