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ADVERTISEMENT.

In laying its Memoirs before the Public, this Society does not hold itself responsible for the facts or opinions which may be advanced on the various topics of Natural History that are discussed. These, accordingly, must be distinctly understood as resting entirely on the individual authority of the respective Writers who have favoured the Society with communications.

CONTENTS.

Page

L-A Monograph of the Genus Allium. By Mr GEORGE

DON, A. L. S.

IL-On the Saphan of the Hebrew Scriptures. By the

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- 123

Rev. DAVID SCOT, M. D., Minister of Corstorphine, - 103

III-On the Structure of the Eye of the Swordfish

(Xiphias gladius, Linn.) By ROBERT EDMOND GRANT,

M. D., F. R. S. E., &c.

IV-Notice regarding a Vein of Asphaltum, or Slaggy

Mineral Pitch, found imbedded in Gneiss, in the Hill

of Castle Leod, near Dingwall, in Ross-shire. By

HENRY WITHAM, Esq. of Lartington, F. R. S. E. and

M. W. S.

V-Description of a New Species of Ornithorynchus. By

Mr WILLIAM MACGILLIVRAY, M. W. S. -

VI-Observations on the Anatomy of the Puca of Brazil

(Calogenus, F. Cuv.) By ROBERT EDMOND GRANT,

M. D., F. R. S. E., &c. -

VII-Sketches of the Comparative Anatomy of the Organ

of Hearing, founded chiefly on the Ear of the Squalus.

By THOMAS BUCHANAN, C. M., M. W. S.

VIII-On the Fossil Remains of Quadrupeds, &c. dis-

- 127

covered in the Cavern at Kirkdale, in Yorkshire, and

in other Cavities or Seams in Limestone Rocks. By

the Rev. GEORGE Young, A. M., M. W. S.

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171

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Page

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IX. Observations on the Anatomy of the Perameles na-

suta, from New Holland. By ROBERT EDMOND

GRANT, M. D., Professor of Zoology and Comparative

Anatomy in the University of London, &c.

IX*.-Meteorological Journal from the Mouth of the Rio

de la Plata to the Coast of Chili, 1822; with a Chart.

BY WILLIAM JAMESON, Esq. Surgeon,

- 203

X.-Memoir on the Geology of the Snowdon Range of

Mountains, as connected with its Scenery, Soil, and

Productions. By JAMES STUART MENTEATH, Esq.

XI-A Commentary on the Second Book of the Herba-

rium Amboinense. By FRANCIS HAMILTON, M. D.

XII. On the Anatomical Peculiarities of the Sturgeon

(Acipenser Sturio, L.) By DAVID CRAIGIE, M. D.,

Extraordinary Member, and formerly President, of the

Royal Medical Society, Edinburgh,

XIII. Observations on the Aranea geometrica, obtextrix, do-

mestica, and other Spiders; and particularly on the

power they possess of fixing their threads horizontally,

or at any degree of inclination, to two perpendicular

bodies at a considerable distance from each other, so

as to suspend the circular part of their web in an open

space: Also some remarks on the Food of Spiders, &c.

By MARK WATT, Esq. M. W. S.

XIV. Description of a Silurus, known in Demerara by the

name of Gilbacke, more properly Geelbuik. By Dr T.

S. TRAILL of Liverpool.

XV. Description of a New Species of Cephalus, which it

is proposed to name Cephalus Cocherani, Cochrane's

Sunfish. By Dr T. S. TRAILL of Liverpool.

XVI.-Remarks on the Genus Scissurella of M. D'Orbigny,

with a Description of a recent British Species. By

JOHN FLEMING, D. D., F. R. S. E. &c.

XVII.-Account of an Optical Illusion called the Fairy

209

268

334

365

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381

384