216 



Mr. R. Gurney on the British Species 



First legs : first joint of endopodite as long as the whole 

 exopodite, the last two joints very small. 



Second and third legs : no inner seta on third joint of 

 exopodite, no seta on basal joint of endopodite. 



Fifth legs of female : basal joint with two setae and three 

 modified spines ; second joint narrow, with six setse. 



Habitat. Fresb water. 



Distribution. Germany, France, South Russia. In Eng- 

 land only in South and East, and in Ireland. Common in 

 Norfolk Broads. 



Fiff.l. 



Filth legs of male (A) and female (B) of N, typica (1), 

 N. spinipes (2), and N. simplex (3). 



2. Nitocra spinipes, Boeck. (Fig. 1, 2 ; fig. 2, B.) 



Nitocra spinipes, Boeck, Forh. i. vid. Selsk. Christ. 1865, p. 274 ; Sars, 



Crustacea of Norway, v. 1911, p. 213. 

 Canthocamptus palustris, Brady, Monog. 1880, p. 53. 

 Canthocamptus palustris, Van Douwe, Zool. Anz. xxix. 1905, p. 519. 

 Canthocamptus palustris, var. elongata, T. & A. Scott, Ann. & Mag. 



Nat. Hist. (6) xiv. 1895, p. 459. 



Rings of spines on abdominal segments not complete 



