CONTENTS. Vll 



Page 

 further Contribution to the Knowledge of Parthenogenesis. By 

 Rudolph Leuckart 411 



XLII. Observations on the Genus Sacculina, Thompson {Pachy- 

 hdellay Diesing ; Peltogaster, Rathke). By R. Leuckart. (With a 

 Plate.) 422 



XLIII. Descriptions of two Coleopterous Insects from the North 

 of China. By T. Vernon Wollaston, M.A., F.L.S 430 



XLIV. On some new Anthribidae. By Francis P. Pascoe, 

 F.L.S. &c 431 



XLV. On the Arrangement of Zoophytes with Pinnated Tentacles. 

 By Dr. J. E. Gray, F.R.S., V.P.Z.S., Pres. Ent. Soc. &c 439 



XLVI. On the Arrangement of the Polarizing Microscope in the 

 Examination of Organic Bodies. By Hugo von Mohl 444 



New Book : — Ceylon : an Account of the Island, Physical, Historical, 

 and Topographical ; with Notices of its Natural History, Antiqui- 

 ties, and Productions, by Sir James Emerson Tennent, K.G., 

 LL.D 450 



Proceedings of the Zoological Society 458 — 461 



On the Electrical Organs of Fishes, by M. Schultze ; Researches upon 

 some of the lower Marine Animals, by R. Leuckart and A. Pa- 

 genstecher ; On a new genus of Goat-sucker and on a new spe- 

 cies of Enicurus, by George R. Gray, F.L.S, ; Notice of a Black- 

 headed Gull found recently in Devonshire, by F. W. L. Ross, 

 Esq 461—467 



Index 468 



