CONTENTS. 



Pagt. 



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

 Hepaticae. By Dr. M. J. Schleidkn 73 



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

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

 Society of Belfast ' * 



XL Contributions towards a knowledge of the Mollusca Nudi- 

 branchia and Mollusca Tunicata of Ireland, with Descriptions of some 

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

 V. P. N. Hist. Society of Belfast. (With a Plate.) 84 



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

 Forbks, 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 Journal of the Mission to Bootan 119 



BIBLIOGRAPHICAL NOTICES. 



Observations on the Blood Corpuscles, or Red Particles, of the Mam- 



miferous Animals. By George Gulliver, F.R.S., F.Z.S 125 



Genera et Species Staphylinorum Insectorum Coleopterorum familise : 



auctore Guil. F. Erichson, &c. &c 127 



The Petrified Insects of Solenhofen, described by Professor Germar 



ofHalle 128 



Transactions of the Berwickshire Naturalists' Club 129 



PROCEEDINGS OF LEARNED SOCIETIES. 



Linnaean Society 130 



Tweedside Physical and Antiquarian Society * 136 



Orkney Natural History Society 137 



Microscopical Society of London 139 



Zoological Society ib. 



MISCELLANEOUS. 



Hirundo purpurea, Purple Martin of America, shot in Britain 146 



Notice respecting Amphipeplea glutinosa , 147 



On Pinus Pumilio, Hk. By Professor Goeppert ib. 



On the Nests of the Fifteen-spined Stickleback, or Gasterosteus spi- 



nachia of Linnaeus 148 



On Vespertilio adilis, Jenyns 149 



A new Marsupial Animal 150 



A new species of Fossil Dolphin ib. 



On the Mineral called Dysodil as a product from the Shells of Infu- 

 soria. By C. G. Ehrenberg ib. 



Meteorological Observations and Table 151, 152 



