CONTENTS. VII 



Page 



XXXVII. On the Affinities of the genus Camptonyx, Benson. I5y 

 Dr. J. K. Gray, F.R.S. &c 40G 



XXXVIII. Cimraeters of Tanysiphon, a new genus of Fluviatile 

 Shells alUed to the Myucid(e. Hy W. II. Benson, Esq. (With a 

 Plate.) ." 407 



XXXIX. Observations on Dracnnculus in the Island of Bombay. 



By II. J. Carter, Esq., H.C.S. Bombay 410 



XL. Synopsis of the Families, Genera, and Species of the British 

 Actinice. By P. H. Gosse, F.R.S 414 



XLI. Note on the Cell-contents of Closterium. By Arthur 

 Henfrey, F.R.S. &c 419 



XLII. On the Development of the Shell and Tube of Aspergillum. 

 By Dr. J. E. Gray, F.R.S. &c , 423 



XLIII. Descrijitions of six newly discovered Species and Characters 

 of a new Genus of Araneidea. By John Blackwall, F.L.S 426 



XLIV. On the Existence of a Sexual Reproduction in the Infusoria. 

 By M. Balbiani 435 



New Book .- — A Cyclopaedia of the Natural Sciences, by William 



Baird, M.D., F.L.S 438 



Proceedings of the Zoological Society ; Botanical Society of Edin- 

 burgh " ." 440— 45G 



Prof. Owen's Lectures on Palaeontology ; On the Teeth of the Black 

 and Wood Shell Slugs, by Dr. J. E. Gray, F.R.S. &c. ; Note on 

 the Anatomy of Cyclostoma elegans, by E. Claparede ; On the 

 Fecundation of the Crustacea, by M. Coste; On the Dorsal 

 Cavity of certain Ammonites, by Prof. Quenstedt ; Note on the 

 Lana of the Spiny Lobster (Palinurus), by M. Coste; On the 

 Organization of the genera Phyllosoma and Sapphirina, by Prof. 

 Gegenbaur ; On the Metamorphosis of the Pranizce into Ancei, 

 by M.Hesse 456—467 



Index 468 



