1v CONTENTS. 
XII. Observations on the Neck of the Three-toed Sloth, Bradypus tridactylus, Linn. By 
Tuomas Brett, Esy., FRSS 18.4855 ZS. .. . page Lis 
XIII. On the Anatomy of the concave Hornbill, Buceros cavatus, Lath. By Ricuarp 
Owen, Esq., F.Z.S., Assistant Conservator . the Museum of the Royal College of 
Surgeons in London . . . iets Us 
XIV. Description of a New Genus of Posie eee se Fishes. ‘By the Rev. R. T. 
Lowe, B.A., Corr. Memb. Z.S. (In a Letter to the Secretary.) . . . 123 
XV. On the Anatomy of the Cheetah, Felis jubata, Schreb. By Ricnarp Owen, Esq., 
F.Z.S8., Assistant Conservator of the Museum of the Royal College of Surgeons 
RELIONELONs se at ee Re: koe Ue Re Ie fo: Fe ae 
XVI. Notice of a Mammiferous Animal from Madagascar, constituting a new Form among 
the Viverridous Carnivora. By E. T. Benwert, Esq., F.L.S., Sec. Z.S.. 137 
XVII. Descriptions of some new Species of Cuvier’s Family of Brachiopoda. By 
W. J. Broperip, Esq., Vice-President - the pa aie and pe Societies, 
RIS Ley Sesh. whe. Soe : 3 As Anheuser las 
XVIII. On the Anatomy of the piscuopeae of Cuvier, and more vipectadly of the Genera 
Terebratula and Orbicula. By Ricnarp Owen, Esq., F.Z.S8., Assistant Con- 
servator of the Museum of the Royal College of Surgeons in London. . . 145 
XIX. Some Account of the maneless Lion Ae Guzerat. ee ose Watter Sm_EE, of the 
Bombay Army, F.Z.S. Seite Lo teh an. GS 
XX. Description of a new ae of the Genus -iRtnte of 2 Dr. Horsfield. By 
Mr. Joun Goutp, F.L.S. Communicated by the Secretary . . . . . 175 
XXI. A few Remarks tending to illustrate the Natural History of two Annulose Genera, 
viz. Urania of Fabricius, and pect of Walckenaer. gil W.S. MacLeay, Esq., 
E:Zyisiheses weeds ‘ ng cae nee eee 
XXII. Descriptions of some new snake of Calyptrecide. By W. J. Broperip, Esq., 
Vice-President of the Geological and Zoological Societies, F.R.S., L.S., &c. 195 
XXIII. On the Anatomy of the Calyptreide. By Ricuarp Owen, Esq., F.Z.8., Assistant 
Conservator of the Museum of the Royal College of Surgeons in London. . 207 
XXIV. On the Structure of the Heart in the Perennibranchiate Batrachia. By Ricuarp 
Owen, Esq., F.Z.8., Assistant Conservator ! the Museum f the Royal College 
of Surgeons in London. . . BN § Saeki cap eealen 
XXV. On the Young of the Ouiiiibehr ct wandabaise Blum. By Ricuarp Owen, 
Esq., F.Z.8., Assistant Conservator of the Museum of the iil College of Sur- 
geons in London. . . . 5 SAR a 220 
XXVI. Notes on the Natural rho and Habits ea the Onsithorhynch paradoxus, 
Blum. By Grorce Bennett, Esg., F.L.S., Corr. Memb. Z.8.. . . . 229 
