FRESHWATER EXTOMOSTBACA FROM SOUTH AFRICA. 467 



about as broad as long. The anterior antennae are very 

 markedly constricted, not only at the hinge-joint, but likewise 

 between the penultimate and antepenultimate joints; there is 

 no spinous prolongation of either of these joints, but the 

 terminal joint has a small digitiform process at its apex. 



This is remarkable among the African species of Diapto- 

 mida3 in respect of the great disparity in size between the 

 two sexes, in the non-reduction of the number of joints in 

 the female urosome, and, lastly, in the rather peculiar form of 

 the distal portion of the male anterior antenna. 



The species occurred plentifully in a gathering made by 

 Dr. Warren in a ''pond between Witzies Hoek and Harrismith, 

 ten miles from Harrismith, February 10th, 1908." 



Genus Paradiaptomus G. 0. 8ars} 



{= Beoteas Loven- = Lovenula 8chmeil^). 



The generic name Protodiap tomus was proposed by 

 Professor Sars in 1895 to receive a South African species 

 described by him (P. lamellatus). This species was 

 evidently congeneric with and very closely allied to that 

 previously described by Loven as Broteas falcifer. Loven's 

 generic term Broteas had been already used by C. L. Koch 

 for a genus of Ai^achnida (1839). The name Para- 

 diaptomus given by Sars must therefore be adopted, if the 

 species is to be considered generically distinct. Lovenula, 

 as proposed by Schmeil, is of later date. It would seem, 

 however, that Professor Sars has himself doubted the 

 expediency of a separate name, inasmuch as he includes 

 under Diaptomus the five species described by him in his 

 report on the 'Copepoda of the Third Tanganyika Expedition.' 

 These seem to be in no respect generically diiferent from 

 Paradiaptomus. 



1 Sars. G. O., ' On some South African Entoniostraca,' 1895. 

 - Loven. L.. ' Fyra nya aster af Sotvattens-Crustaceer irkw Sodva 

 Afrika.' 1S46. 



3 Schmeil. O.. 'Das Tierreich, Copepoder, 1 Gymnoplea." 1898. 



