CONTENTS OF VOL. IV. 



[THIRD SERIES.] 



NUMBER XIX. 



Page 



I. On the Metamorphoses of the Vorticellce. By M. Jules 

 D'Udekem 1 



II. On the Development of the Vegetable Ovule called * Anatro- 

 pous.' By John Miers, F.R.S., F.L.S. &c 12 



III. On Dracunculus and Microscopic Filaridce in the Island of 

 Bombay. By H. J. Carter, Esq., Bombay. (With three Plates.) . 28 



IV. On the Occurrence of a Fish (Pteraspis) in the Lower Ludlow 

 Rock. By J. W. Salter, F.G.S 44 



V. Notes on the Hydroid Zoophytes. By Prof. Allman 48 



VI. Descriptions of new Genera and Species of Phytophagous 

 Insects. By J. S. Baly, Esq 55 



New Book : — The Instructive Picture Book ; or, a few attractive Les- 

 sons from the Natural History of Animals. By Adam White, 

 Assist. Zool. Department, Brit. Mus 62 



Proceedings of the Royal Society; Geological Society 63 — 77 



Occurrence of Rhinolophus Hipposideros in Ireland ; Saxicava rugosa 



a Byssus-spinner, by David Robertson, Esq 80 



NUMBER XX. 



VII. On the Laws of Evolution of the Organic World during the 

 Formation of the Crust of the Earth. By H. G. Brunn 81 



VIII. Observations on the Shell and Animal of Hybocystis, a new 

 genus of Cyclostomidce, based on Megalomastoma gravidum and Oto- 

 poma Blennus, B. ; with Notes on other living Shells from India and 

 Burmah. By W. H. Benson, Esq 90 



