216 



Mr, R. Guiney 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 setse and three 

 modified spines ; second joint narrow, with six setae. 



Habitat. Fresh water. 



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

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

 Norfolk Broads, 



Ficr. 1. 



I 



Filtli legs of male (A) and female (B) of N. typim (1), 

 N. Kjjmipes (2), and N. simpler (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 Nor\Yay, v. 1911, p. 218. 

 Canthocainptus palustris, Brady, Monog. 188t>, p. 63. 

 Canthocmnjytus palustris, Van Douwe, Zool. Anz. xxix. 190-5, p. 519. 

 Canthocmnjitus 2)alustris, var. ehngata, T. & A. Scott, Ann. & Ma"-, 



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



Rings of spines on abdominal segments not complete 



