IV CONTENTS. 



Abyssinian Grasses; The Snake Nut; M. von Humboldt on 

 Mr. Darwin's Voyage of the Beagle, and on Mr. Schomburgk's 

 Expedition; Meteorological Observations and Table. page 09 — 72 



NUMBER XXIX. 



IX. On the Structure of the Cellular Membrane in Mosses and He- 

 paticse. By Dr. M. J. Sculeiden 73 



X. On a minute Alga which colours Ballydrain Lake, in the covmty 

 of Antrim, By Wm. Thompson, Esq., Vice-Pres. Nat. Hist. Society of 

 Belfast 75 



XI. Contributions towards a knowledge of the MoUusca Nudi- 

 hranchia and MoUusca Tunicata of Ireland, with Descriptions of some 

 apparently new Species of Invertebrata. By Wm. Thompson, Esq., 

 Vice-Pres. Nat. Hist. Society of Belfast. (With a Plate) 84 



XII. On some New and Rare British MoUusca. By Edward 

 Forbes, M.W.S., For. Sec. B.S., &c. (With a Plate) 102 



XIII. Catalogue of the Species of Reptiles collected in Cuba by 

 W. S. MacLeay, Esq. ; — with some Notes of their Habits extracted 

 from his MS. By J. E. Gray, Esq., F.R.S. 108 



XIV. Characters of Five new Species of Orchidaceous Plants from 

 Dominica. By Prof. Lindley „ 115 



XV. Information respecting Zoological and Botanical Travellers : — 



Mr. Gould's Expedition to examine the Zoology of Australia 116 

 Mr. Griffith's J ournal of the Mission to Bootan 119 



New Books: — Observations on the Blood Corpuscles, or Red Particles, 

 of the Mammiferous Animals, by George Gulliver, F.R.S., F.Z.S. 

 — Genera ,et Species Staphylinorum Insectorum Coleopterorum fa- 

 milifB : auctore Guil. F. Erichson, &c. &c. — The Petrified Insects 

 of Solenhofen, described by Professor Germar of Halle. — Transac- 

 tions of the Berwickshire Naturalists' Club 125 — 129 



Proceedings of the Linnsean Society ; Tweedside Physical and Anti- 

 quarian Society ; Orkney Natural History Society ; Microscopical 

 Society of London ; Zoological Society 130 — 139 



Hirundo purpurea, Purple Marten of America ; Notice respecting Am- 

 pMpeplea glutinosa ; On Pinus pumiUo, Hk, by Professor Goep- 

 pert ; On the Nests of the Fifteen-spined Stickleback, or Gaste- 

 rosteus spinachia of Linnaeus ; On VespertiUo eedilis, Jenyns ; A 

 new Marsupial Animal; A new Species of Fossil Dolphin ; On the 

 Mineral called Dysodil as a product from the Shells of Infusoria, 

 by C. G. Ehrenberg; Meteorological Observations and Table 146 — 152 



NUMBER XXX. 



XVi. On the Irregular Form of the Flower of the Papilionacece. 

 By H. Walpbrs, from the Linnsea, vol, xiii 153 



n 



