CONTENTS. 



Art, X. — Monograph of the Genus Ilelkina. Bj/ Mr. 



Jon a Edward Gray 6^ 



Art. XI. — Monograph of the Ci/prceidcce, a Family/ of Tes- 

 taceous Mollusca. By the same, (to be continued) .... 71 



AiiT. Xlf. — Abstract of a " Memoir on a New Genus of the 

 Order Rodentia, named Capromys." By M. G. A. Des- 

 ha rest 81 



AuT. XIII. — Catalogue of Birds, and of terrestrial and 

 fluviatile Molluscce found in the vicinity of Geneva. Com- 

 municated by H. T. De La Beche, Esq. M.G.S 89 



Art. XIV. — Abstract of a Memoir on the Physiology of 

 Helix Potnatia; by M. B. Gaspard, D.M.; zcilh 

 Notes, by T. Bell, Esq. F.L.S 03 



Art. XV. — Memoir on the Chemical Composition of the 

 Corneous Parts of Insects; by M. Augustus Odier. 

 Translated from the oi iginal French,with some additional 

 Remarks and Experiments ; by J. G. Children, Esq. 

 F.R. Sf L.S 104 



AttT. XVI. — Analytical Notices : — 



Curtis' S British Entomology ,.... 119 



Supplement to the Appendix of Captain Parry^s Voyage, 



1819—20 117 



Dilhsyn on Fossil Shells 120 



Memoires de la Societe d' Ilistoire Naturelle de Paris. . 121 



SoKcrby^s Mineral Conchology 123 



Genera oj Recent and Fossil Shells 124 



Art, XVII. — Proceedings of Learned Societies : — 



Royal Society 124 



Linnean Society 1 30 



Zoological Club of the Linnean Society 132 



Art. XVIII. — Scientific Notices: — 



Linnean Society of Calvados 1 33 



Etheria — Lamarck 1 54 



Accentor Alpinus 1 34 



Plesiosaurus 135 



