1904.] ENTOMOSTRACA FROM SOUTH AFRICA. 301 



Last pair of legs with the inner ramus one-jointed and armed 

 terminally with two short spines ; terminal joint of the outer 

 ramus provided with three stout spines, of which the inner and 

 stronger is a prolongation of the joint ; the other two are jointed, 

 the middle one being cleft into two nearly equal spines. 



Length 3 mm. 



Male. — Body rather more slender than that of the female ; tail 

 consisting of five segments, the second and third of which bear a 

 few very minute spines. Caudal rami as in female ; the setse not 

 asymmetrical as in L. falcifera. Last legs closely resembling 

 those of that species (fig. 13). 



Of this species two females and one male were included in the 

 collection. 



I have been in doubt as to whether to include this new species 

 in the genus Lovenula Schmeil, or to form a new genus for its 

 reception. Among the most important characters of the genus 

 Broteas, as defined by G. 0. Sars (1899)*, are these: that the 

 caudal rami of the male are asymmetrical, and that the posterior 

 maxillipeds have only three terminal joints. In both these 

 characters my species difiers from the type. On the other hand, 

 the agreements are very striking in other respects : in the form 

 of the swimming-legs, in the two-jointed tail of the female, even 

 in the form of the posterior maxillipeds (apart from the number 

 of joints), it agi-ees with the genus Lovenula or Broteas, and 

 difiers from all other genei^a. If it is to be included in the 

 genus Lovenula the definition of that genus will have to be 

 modified somewhat. Lovenula mea may be said to provide a link 

 with the genus Diaptomus, being less specialised in the form of 

 its furca and posterior maxillipeds than are the other two species, 

 L. falcifera and L. lamellata (Sars). 



EXPLANATION OP PLATE XVIII. 



Fig. 1. StreptocepJialus dreffei Sars {p. 298). Dorsal view of head of female. X 18. 



2. „ , , All egg from the marsupium. X 34. 



3. Moina, belli, sp. u. (p. 299). Side view of female. X 23. 



4. „ ,, Postabdomen. X 90. 



5. Zieydigia africana, sp. ii. (p. 300). Side view of female. X 60. 



6. „ „ Postabdomen. X 156. 



7. Lovenula mea, sp. ii. (p. 300). Dorsal view of female. The left furcal ramus 



broken off. X 18. 



8. „ „ Tail of another female, showing spermato- 



phore. X 34. 



9. ;, „ Posterior maxillipede of female. X 60. 



10. „ „ First leg of female. X 72. 



11. „ 5, Last leg of female. X 60. 



12. „ „ Posterior maxillipede of male. X 60. 



13. ;. „ Last pair of legs of male. X 60. 



* Arch. f. Math, og Naturv. xxi. no. 2, 1899. 



