of the Copepod Genus Nitocva. 219 



Fifth leg of female : basal joint Avitli five setse, 2ncl joint 

 narrow, witli five setee. 



Habitat. Brackish water, Phlegrasan Plain, Italy. 



(3) Nitocra fi-ayilis, Sars. 



Nitocrafragilk, Sars, Zool. Jahrb. (Syst.) xxi. 1905, p. 386. 



Closely resembling N. spinipes. Diflfers from it in shape 

 of fifth leg. 



Habitat. Brackish water, Chatham Islands. 



(4) Nitocra platypus^ Daday. 

 Nitocra platypus, Daday, Zool. Jahrb. (Syst.) xxiv. 1906, p. 192. 



Spine-rings of abdominal segments complete in last three 

 segments in ($ , incomplete dorsally in ? . . 



First leg : rami of equal size. 



Fifth leg : ? — basal joint with one long seta and four very 

 small ones, 2nd joint small, with five short setse. ^ — basal 

 joint with three very short spines, 2nd joint with five short 

 setse. 



Habitat. Fresh water {?). Siam. 



The following species which have been ascribed to the 

 genus Nitocra shoulcl, in my opinion, be referred to other 

 genera : — 



(!) Nitocra paradoxa^ Dad.iy. 



Nitocra paradoxa, Daday, Zool. Jabrb. (Syst.) xix. 1904, p. 492 

 ^Turkestan). 



The possession of two egg-sacs, the structure of the man- 

 dible-palp, and the absence of denticles on the operculum, 

 together witli the arrangement of the setje of the swimming- 

 legs bring tiiis species within the definition of the genus 

 Schizojjera, Sjirs, eight species of which have been desoibcd 

 by Prof, Sars from Lake Tanganyika, while he notes the 

 occurrence of species also in the Chatham Islands, Caspian 

 Sea, and in Birket-el-Kurun, Egypt. 



(2) Nitocra phleffrau, Brehn. 



Nitocra pltlcgrcra, Breliiii, Zool. Anz. xxxiv. 1909, p. 422 (Italy). 



Brehm's description is somewhat incomplete, but the 

 extreme elongation of the endupodite of the first leg and 

 the form of the sensory spine at the base of this leg in the cJ 

 agree more with the gcinis Aineiru than with Nitocra. 



