218 



Mr. R. Gurney on the British Species 



Second and third legs : inner seta of third joint of exo- 

 podite present. No seta on basal joint of endopodite. 



Fifth leg of female : basal joint with five setae, second 

 joint with six setse, rather narrower than in N. spinipes. 



Figr. 2. 



A. N. typica. First leg of female. 



B. N. spinipes. First leg of male. 



C. N. simplex. First leg of male. 



First antenna of male : penultimate joint with a row of 

 knobs. 



Habitat. Slightly brackish water. - 



Distribution. Germany (Baltic Coast). Norfolk — Hickling 

 Broad and a ditch at Cley-by-Sea. 



The genus includes also the following species : — 



(1) Nitocra pusilla, Sars. 

 Nitocra jmsilla, Sars, Crust, of Norway, v. p. 396. 



Differs from all other species in absence of spines from 

 the operculum and last segment of the abdomen. In this 

 and other respects it approaches the genus Ameira. 



Habitat. Marine. Norwegian Coast. 



(2) Nitocra ivolterecki, Brehm. 

 Nitocra tvolterecki, Brehm, Zool. Anz. xxxiv. 1909, p. 421. 

 First leg : rami of equal length. 



