- - • 



Vlli CONTENT!*. 



Pago 



Ozycorynia, a new Synascidian Genus, by Dr. R. von Drasche j On 

 the Direct Reproduction of Tapeworms, by M. P. M6gnin; 

 Note on the Carotids of Rhea americana, by Franklen P. Evans, 

 Esq., University College, Bristol ; On the Origin of Alternation 

 of Generations in Hydro-Medusae, by W. K. Brooks ; Ophryo- 

 cyst is Butschlii, by M. A. Schneider 455 — 459 



Index 



460 



PLATES IN VOL. XI. 



Plate I. Farringdon Sponges. 



II, Elymnias Peali ; New species of Platypleura. 



III. Anatomy of Haematopinus tenuirostris, 



IV. Sphenopteris crassa. 



V. Development of the Siphonophora. 



VI. 

 VII. 



Marine Polyzoa, 



VIII. Jura— ie varieties of Thurammina papillata. 



IX. 





yj 1" Fruit of Bornia — Sphenophvlluiu tenerritmiui 



XII. 



XIII. Development of some Protozoa. 

 XIV. 

 XV 



XVI. New Mollusca. 



XVII. I Marine Polvzoa. 

 XVIII. * 



' J-Spougida. 



