VI CONTENTS. 



Page 



NUMBER CVI. 



XXV. Monograph of the British Umbilicarice. By the llcv. W. 



A. Leighton. B.A.. F.B.S.E. (With a Plate.) 273 



XXVI. On the Development of the Lampreys. By August 

 MuLLER i^8 



XXVII. Monograph of the genus Ca/o/)s. By Andrew Murray. 302 



XXVIII. Contributions to the Anatomy of the Infusoria. By 



N. LlEBERKUHN 319 



XXIX. New British Arthonia. By the Rev. W. A. Leighton, 

 B.A., F.B.S.E. (With a Plate.) 330 



Proceedings of the Royal Society ; Botanical Society of Edinburgh ; 



Zoological Society 333 — 348 



Obituary Notice — William Yarrell; Amphioxus lanceolatus, by W. 

 P. Cocks ; Description of a newly discovered Tanager of the 

 genus Buarremon, by Philip Lutley Sclater, M.A. &c. ; Meteo- 

 rological Obser^'ations and Table 348 — 352 



NUMBER CVII. 



XXX. A Notice of some New Genera and Species of British Hydroid 

 Zoophytes. By Joshua Alder, Esq. (With three Plates.) 353 



XXXI. The Vegetable Individual, in its relation to Species. By 

 Dr. Alexander Braun, Professor of Botany in the University of 

 Berlin, &c. Translated by Chas. Francis Stone, B.A 363 



XXXII. On the young state of Ophiocoma rosula, and on the Form 

 and Development of the Spines of this species. By T. H. Stewart. 

 (With a Plate.) 387 



XXXIII. Monographof the genus C«/ops. By Andrew Murray. 391 



XXXIV. Elucidation of some Plants mentioned in Dr. Francis 

 Hamilton's Account of the Kingdom of Nepiil. By Lieut. -Colonel 

 Madden, F.R.S.E., President of the Botanical Society of Edinburgh. 404 



XXXV. Notice of a New Subgenus of Helicinadce. By Dr. J. 



E. Gray, F.R.S 414 



Proceedings of the Zoological Society 415 — 424 



On Clausilia Rolphii and Mortilleti, by W. H. Benson, Esq. ; On the 

 Origin of Greensand, and its Formation in the Oceans of the 



