CONTENTS. V 



Page 



XXV. On the British DesmidiecF. By John Ralfs, Esq., M.R C.S., 

 Penzance. (With a Plate.) 187 



XXVI. Caroli Linnjei Exercitatio Botanico-Physica de Nuptiis 

 et Sexu Plantarum. Edidit et Latine vertit M. Johannes Arv. Af- 



ZELIUS 194 



New Book : — Annales des Sciences Naturelles for March, April and 



May 1844 204 



Proceedings of the Zoological Society; Linnaean Society; Botanical 



Society of Edinburgh 205—225 



Cutleria multifield (Additional Note by Dr. Dickie) ; M. Montagne on 

 the Colouring of the Waters of the Red Sea ; M. de Quatrefages 

 on Gasteropod Mollusca ; Of the Sexes in Holothuria, Asterias, 

 and Planaria, — Nervous System of Planarice ; On the Chrysan- 

 themum leucanthemum, as a specific remedy against Fleas, by Prof. 

 Cantraine ; Drayton, on the Birds of Lincolnshire and the Fens ; 

 Meteorological Observations and Table 225 — 232 



NUMBER XCI. 



XXVII. Upon the Development of Star-fishes. ByM.SARs. (With 



a Plate.) 233 



XXVIII. On the Fructification of Gloiosiphonia capillaris, Carm. 



By the Rev. David Landsborough. (With a Plate.) 240 



XXIX. Brief Descriptions of several Terrestrial Planarice, and of 

 some remarkable Marine Species, with an Account of their Habits. By 

 Charles Darwin, F.R.S., V.P. Geol. Soc. (With a Plate.) 241 



XXX. Catalogue of Irish Entozoa, with observations. By O'Bryen 

 Bellingham, M.D., Fellow of and Professor of Botany to the Royal 

 College of Surgeons in Ireland, &c. (Continued.) 251 



XXXI. On the British Desmidiece. By John Ralfs, Esq., M.R.C.S., 

 Penzance. (With a Plate.) 256 



XXXII. On the genus Xiphophora, and, in connexion with it, Ob- 

 servations on this question : Do we find in the Fucacece the two Modes 



of Propagation which we observe in the Floridecel By Dr. Montagne. 261 



XXXIII. Further Observations on Ctenodus Labillardieri. By C. 

 Montagne, D.M., in a Letter to the Rev. M. J. Berkeley, M.A., 

 F.L.S 265 



XXXIV. Description of a Fossil Molar Tooth of a Mastodon disco- 

 vered by Count Strzlecki in Australia. By Prof. Owen, F.R.S 268 



XXXV. An Attempt to Classify the Tetrabranchiate Cephalopods. 

 By William King, Curator of the Museum of the Natural History 

 Society of Northumberland, Durham, and Newcastle-upon-Tyne 271 



XXXVI. Generic characters of an undescribed Australian Fish. 

 By John Richardson, M.D., F.R.S. &c, Medical Inspector of Naval 

 Hospitals 280 



