CONTENTS. V 



Page 

 two other species of Spiders. By Adam White, M.E.S., Assistant in 

 the Zoological Department of the British Museum. (With a Plate.)... 179 

 XXIII. Notice of some Genera of Cyclopacea. By J. D. Dana ... 181 



Proceedings of the Linnaean Society; Zoological Society 186 — 208 



On the Development of the Medusae, by Dr. Reid ; New species of 

 Mammalia, by J. E. Gray, F.R.S. ; General Views on the Classi- 

 fication of Animals, by J. D. Dana; On two new species of An- 

 telopes in the British Museum Collection, by J. E. Gray, F.R.S. ; 

 Meteorological Observations and Table 208 — 216 



NUMBER CXIX. 



XXIV. Revision of the British Libellulidce. By Baron Edm. de 

 Selys Longchamps (of Liege), Member of various Academies 217 



XXV. On the Arrangement of the Hollow-horned Ruminants 

 (Bovidce). By J. E. Gray, F.R.S 227 



XXVI. An Account of some Shells and other Invertebrate Forms 

 found on the coast of Northumberland and of Durham. By William 

 King, Curator of the Newcastle Museum 233 



XXVII. The Birds of Calcutta, collected and described by Carl J. 



SUNDEVALL 251 



XXVIII. On the Growth of Cell-Membrane. By Hugo von Mohl. 261 



New Books : — Palaeontographica : Beitrage zur Naturgeschichte der 

 Vorwelt. Herausgegeben von Dr. W. Dunker und Herm. von 

 Meyer. — Symbolae ad Historiam Heliceorum, auctore L. Pfeiffer. 

 — Philippi's Figures and Descriptions of new or incompletely 

 known Shells. — Journal of Malacozoology, edited by Menke and 

 Pfeiffer. — Indicis Generum Malacozoorum Primordia, by A. N. 

 Herrmannsen. — Figures of Flowering Cacteae, edited by Pfeiffer 

 and Otto, with German and French descriptions 272 — 275 



Proceedings of the Zoological Society 276 — 284 



A new genus of Sea-Snake from Port Essington, by J. E. Gray, F.R.S. ; 

 On the Pulmograde Medusae of the British Seas, by Prof. E. 

 Forbes; Meteorological Observations and Table 284 — 288 



NUMBER CXX. 



XXIX. Notices of some new and rare British species of Naked 

 Mollusca. By Joshua Alder and Albany Hancock. (With a Plate.) 289 



XXX. Notices in connexion with the Natural History of Corfu and 



its vicinity. By Captain Portlock, Royal Engineers, F.R.S 294 



XXXI. Descriptions of some newly discovered species of Araneidea. 



By John Blackwall, F.L.S 297 



