22 G. O. Sars. 



pairs distinctly 3-articulate. Last pair of legs in both sexes 

 built much upon the same type as in Diaptomus. 



Kemarks. — This genus is certainly very closely allied 

 to Diaptomus, yet differs in some points so very markedly, 

 that, in my opinion, it evidently ought to be kept apart 

 from it. The most striking differences consist in the reduced 

 number of segments in the tail of the female, the compara- 

 tively poor development of the posterior antennæ, and the 

 peculiar structure of the posterior maxillipeds, which on 

 the contrary are much stronger than in Diaptomus, and 

 are especially distinguishable by the small number of joints 

 in the terminal part, and the strong claw-like spines with 

 which this part is armed. The genus comprises as yet only 

 2 species, both from South Africa. 



1. Broteas falcifer, Loven 



(see accompanying plate). 



Broteas falcifer. Loven, Fyra nya arter af Sötvattens- 

 Crustaceer från södra Afrika. Kgl. Vetensk.-Akad. Handlingar, 

 1845, p. 436, Pl. VL 



Body moderately slender, with the anterior division 

 oblong subcylindric; cephalic segment considerably tapering 

 in its anterior part, with the front narrowly rounded, dorsal 

 sulcus well marked; lateral lobes of last segment in female 

 rather broad and pronouncedly asymmetrical. Tail of female 

 rather narrow, genital segment but slightly dilated in front 

 of the middle, 2nd segment longer than the former, and 

 widening but slightly distally; caudal rami of moderate 



