vl CONTENTS. 
Page 
XXX. On Trichites, a fossil genus of Bivalve Mollusks. By Joun 
oRIT eG. (CW Ath a PAPC.) ioc cade sasecttsiendevenedaua tune salaspaeagen uses 343 
XXXI. Characters of nine new or imperfectly described species of 
Planorbis inhabiting India and China. By W. H. Benson, Esq....... 348 
XXXII. Observations on the Littorinide. By Witt1am Crarx, 
BM Me were selsaeeaseneessrenswesaecas usiduosnn elon stages esiteelaee eae an taeiteannty 352 
XXXIII. Notices of British Fungi. By the Rev. M. J. Berxexey, 
M.A, F.L.S., and C. E. Broome, Esq. (With two Plates.) ......... 365 
XXXIV. On the species of Cercolabes confounded under the name 
of C. prehensilis. By J. E. Gray, Esq., F.R.S., Pres. Bot. Soc. &. ... 380 
XXXV. On the characteristic Fossils of the Chalk Formation. By 
L. Von Bucu. Communicated by Prof. J. NIcon .......cecsssssccecsces 381 
XXXVI. Descriptions of British 4phides. By Francis WaLker, 
BM Siiaaahsneiah-Weucmesinniess nehecseaaeasneeestescas 41 Uaeeisuy es ceua “anise eeaeenee 388 
Proceedings of the Zoological Society ; Linnzean Society; Botanical 
Society of -Bdinbursit | sc2.Jc.dcccsuc~ ces panvaewe AERA cee 395—424 
On the Pathology of the Silk-Worm (Bombyx Mori, L.); Examination 
of the Blood, by F. E. Guérin: Meneville; British Museum; Eechi- 
nocactus Eyriesii, by J. Toulmin Smith, Esq. ; Cause of the Potato 
Disease ; On the Nature of the Gregarine, by Dr. F. Stein; Way 
in which Toads shed their Skins ; Meteorological Observations and 
MD RDLE ss iiss seokstadue dé csaneesSaencavn ge none eee Saceuteaysexcassenee 424—432 
NUMBER XXX. 
XXXVII. Notes on an Examination of Lamarck’s species of Fossil 
Terebratule. By Tuomas Davipson, Esq., Member of the Geol. Soc. 
of France. [Illustrated by figures of all the species drawn from the 
original specimens. (With three Piates.)...... Saas yoewekeds obi; a kteeeeme «. 433 
XXXVIII. On the Internal Structure of Zerebratula pectuncu- 
loides, Schl., Terebratula pulchella, Nils., and Terebratula Deslong- 
champsii, nob. By Tuomas Davipson, Esq. (With a Plate.) ......... 449 
XXXIX. On some Inhabitants of the Freshwater Muscles. By 
CP VOGT Veg ak woe dace ses cnwes cUencen resto ocweg ned son tds etlcan semen weenie ateeaeeets 450 
XL. Notices of British Fungi. By the Rev. M. J. Beneclll M.A,, 
F.L.S., and C. E. Broome, Esq. (With two Plates.)........sceresssesees 455 
XLI. On Hyoscyamus and Physochlena. By Joun Miers, Esq., 
BRS.) FALLS. © vacscsvecsosisee teens vec ave ougresesiieep asics ans aesep@@ahpans sacs 467 
XLII. On the genus Waltonia. By Tuomas Davipson, Esq. (With 
BP late.) .ccccenseesnce scars scasisilenpincene sacs s(sehamaans Set aaeReetaais onda 474 
