I. A PRELIMINARY NOTE ON SOME NEW 

 SPECIES OF COPEPODA. 



By Capt. R. B, Seymour Sewei<l, B.A., I. M.S., Surgeon-Natur- 

 alist to the Marine Survey of India and Assistant Superintendent , 

 Zoological Survey of India. 



(With Plates IX— X.) 



The following species of Copepoda, hitherto unknown to 

 science, were obtained in two collections. The first of these is a 

 large and extremely interesting collection made by members of the 

 Zoological Survey of India during their survey of the Chilka 

 Lake.' The Copepoda present an interesting mixture of freshwater 

 and true marine forms. I give below a list of the various species 

 that I have been able to identify from the Chilka collection : — 



Family Calanidae. 



Genus Paracalanus, Boeck. 



Paracalanus crassirostris (Dahl). 

 Genus Acrocalanus, Giesbrecht. 



Acrocalanus similis, Sewell. 



Family Centropagidae. 



Genus Pseudodiaptomus , Herrick. 



Pseiidodiaptomus lobipes, Gurney. 



P seudodiaptomiis hickmani, Sewell, 



Pseudodiaptojnus binghami, Sewell. 



Pseudodiaptomus annandalei, sp. nov. 



Pseudodiaptomus tollingeri, sp. nov. 

 Genus Diaptomus, Westwood. 



Diaptomus cinctus, Gurney. 



Family PonteIvUdae. 



Genus Labidocera, Lubbock. 



Labidocera pavo, Giesbrecht. 

 Genus Acartia, Dana. 



Acartia centrura, Giesbrecht. 



Acartia spinicauda , Giesbrecht. 



Acartia southwelli, Sewell. 



Acartia chilkaensis, sp. nov. 



1 See Mem. Ind. Mtis., Vol. V. 



