VI CONTENTS. 



Page 



XXX. On Trichites, a fossil genus of Bivalve Molliisks. By John 

 Lycett, Esq. (With a Plate.) 343 



XXXI. Characters of nine new or imperfectly described species of 

 Planorhis inhabiting India and China. By W. H. Benson, Esq 348 



XXXII. Observations on the Littorinidce. By William Clark, 

 Esq 352 



XXXIII. Notices of British Fungi. By the Rev. M. J. Berkeley, 

 M.A , F.L.S., and C. E. Broome, Esq. (With two Plates.) 365 



XXXIV. On the species of Cercolahes confounded under the name 



of C. prehensilis. By J. E. Gray, Esq., F.R.S., Pres. Bot. Soc. &c. ... 380 



XXXV. On the characteristic Fossils of the Chalk Formation. By 



L. Von Buck. Communicated by Prof. J. Nicol 381 



XXXVI. Descriptions of British Jphides. By Francis Walker, 

 F.L.S 388 



Proceedings of the Zoological Society ; Linnaean Society ; Botanical 



Society of Edinburgh 395—424 



On the Pathology of the Silk- Worm {Bomhyx Mori, L.) ; Examination 

 of the Blood, by F. E. Gu6rin Meneville; British Museum ; Echi- 

 nocactus Eyriesii, by J. Toulmin Smith, Esq. ; Cause of the Potato 

 Disease ; On the Nature of the Gregarincc, by Dr. F. Stein ; Way 

 in which Toads shed their Skins ; Meteorological Observations and 

 Table o 424--^432 



NUMBER XXX. 



XXXVII. Notes on an Examination of Lamarck's species of Fossil 

 TerebraiulcE. By Thomas Davidson, Esq., Member of the Geol. Soc. 

 of France. Illustrated by figures of all the species drawn from the 

 original specimens. (With three Plates.) 433 



XXXVIII. On the Internal Structure of Terehr alula pectuncu- 

 loides, Schl., Terehratula pulchella, Nils., and Terebratula Deslong- 

 champsii, nob. By Thomas Davidson, Esq. (With a Plate.) 449 



XXXIX. On some Inhabitants of the Freshwater Muscles. By 



C. VoGT 450 



XL. Notices of British Fungi. By the Rev. M. J. Berkeley, M. A., 



F.L.S., and C. E. Broome, Esq. (With two Plates.) 455 



XLl. On Hyoscyamus and Physochlana. By John Miers, Esq., 



F.R.S., F.L.S 467 



XLIL On the genus Wallonia. By Thomas Davidson, Esq. (With 



a Plate.) ■ '^''^ 



