VI CONTENTS. 



Page 



XXXVII. iTiformation respecting Zoological and Botanical Tra- 

 vellers : — Mr. Sclioniburgk. — Letter from Messrs. Forbes and Thomp- 

 son, with Captain Graves, in the Archipelago 348 



New Books : — The Principles of Botany, by W. Hughes Willshire, 

 M.D. — Arcana Entomologica, or Illustrations of new, rare, and 

 interesting Exotic Insects, by J. O. Westwood, F.L.S., &c. ; Na- 

 turhistorisk Tidskrift : edited by Henrik Kroyer, Copenhagen. — 

 Tijdschrift voor Natuurlijke Geschiedenis en Physiologie, by Pro- 

 fessors Van der Hoeven and De Vriese. Part VI. Leyden . 322 — 326 



Proceedings of the Geological Society ; Zoological Society ; Werne- 



rian Society; Royal Society of Edinburgh , 326 — 348 



Mr. Yarrell on Motacilla alba of Linnaeus ; Mr. Johnson on ChcRtura 



ruftcollis ; Meteorological Observations and Table 350 — 352 



NUMBER XLV. 



XXXVIII. On the Existence of Branchiae in the young Ccecilics ; 

 and on a Modification and Extension of the Branchial Classification of 

 the Jmphibia. By John Hogg, Esq., M.A., F.R.S., &c 353 



XXXIX. Supplement to a Catalogue of Irish Zoophytes. By 

 Arthur Hill Hassall, Esq. Read before the Natural History So- 

 ciety of Dublin, November 6th, 1840. (With Plates) 363 



XL. On the Composition of Chalk Rocks and Chalk Marl by invi- 

 sible Organic Bodies : from the Observations of Dr. Ehrenberg. By 

 Thomas Weaver, Esq., F.R.S., F.G.S., M.R.I. A., &c. &c 374 



XLI. Report of the Results of Researches in Physiological Botany 

 made in the year 1839. By the late F. J. Meyen, M.D., Professor of 

 Botany in the University of Berlin 399 



XLII. On the Urari, the Arrow Poison of the Indians of Guiana ; 

 with a description of the Plant from which it is extracted. By Robert 

 H. ScHOMBURGK, Esq 407 



XLI 1 1. A List of the Fossil Shells found in a Fluvio-Marine Deposit 

 at Clacton in Essex. By John Brown, Esq., F.G.S 427 



New Books : — On the Relation between the Holy Scriptures and some 

 parts of Geological Science, by J. Pye Smith, D.D. — The Cer- 

 tainties of Geology, by W. Sidney Gibson, F.G.S. — Linnaea, ein 

 Journal fiir die Botanik, &c. — Icones Fungorum hucusque cogni- 

 torum 429—434 



Proceedings of the Entomological Society ; Linnaean Society ... 434 — 444 



Third Meeting of the Men of Science of Italy ; Dr. Lush on the Madi, 

 or Chili Oil-seed, Madia sativa ; Diurnea Noveinhris, or Novem- 

 ber Dagger; Meteorological Observations and Table 445 — 418 



