CONTENTS OF VOL. X. 



[FOUETH SERIES.] 



NUMBER LV. 



Page 



I. Contributions to the Study of the Eutomostraca. By George 

 Stewardson Brady, C.M.Z.S. &c. — No. VII. A List of the Non- 

 parasitic Marine Copepoda of the North-east Coast of England. 

 (Plates II.- VI.) ] 



II. Further Observations on the Myology of Sarcoj^hilus ursimis. 

 By Alexander Macalister, M.B., Professor of Zoology, Univer- 

 sity of Dublin, and Director of the University Museum 17 



III. The Origin of the Vertebrate Skeleton. By Harry G. 

 Seeley, St. John's College, Cambridge 21 



IV. Proposed name for the Sponge-animal, viz. " Spongozoon ;" 

 also on the Origin of Thread-cells in the Spongiadse. By H. J. 

 Carter, F.R.S.\tc ' 45 



V. On my so-called Globiocephalus Grayi. By Dr. Hermann 

 Burmeister 51 



VI. On Emys nigra from Upper California. By Dr. J. E. Gray, 

 F.E.S. &c 54 



VII. Experimental Researches upon the Position of the Centre of 

 Gravity in Insects. By Felix Plateau 55 



VIII. Observations on Mr. Carter's Paper ''On two new Sponges 

 from the Antarctic Sea, and on a new Species of Tethya from Shet- 

 land ; together with Observations on the Reproduction of Sponges 

 commencing from Zygosis of the Sponge-animal." By J. S. Bower- 

 bank, LL.D., F.R.S., &c 58 



IX. On a new Species of Timalia from Eastern India. By Ar- 

 thur Viscount Walden, P.Z.S., F.R.S (31 



X. Notes on the Anatomy of the Derriah (^Cynocephalus hama- 

 dryas). By Alexander Macalister, M.B., Professor of Zoology, 

 University of Dublin 62 



On some Dermal Tubercles associated with Fossil Fish-remains, by 

 James Thomson ; On the two (?) unknown Species of Argus 

 Pheasant, by T. W. Wood ; Note on a Deformed Example of 

 Cariama cristata, by Dr. A. Giinther; On the Natural Affinities 

 of the Balistidce, by M. C. Dareste ; On the Synonymy of the 

 Genera of Euryalidce,hy Dr. J. E. Gray, F.R.S. &c. ; On a neAv 

 Species of Paindoxorms, by the Abbo A. David ; Investigations 

 on Fossils Birds, by M. A. Milne-Edwards ; Migrations of the 



