BEtONGHJTG 10 DAPHNIA AND OTHER ALLIED GENEEA. 



225 



Var. propinqua. (Fig. A. and PI. YIII., figs. 21, 22). 



1895. Daphnia propinqua, Gr. 0. Sars, On some South African 



Entomostraca raised from dried mud (Videnskabs- 



Selskabets Skrifter. I. Mathematisk-naturv Klasse, 



1895, No. 8), p. 9, pi. II., figs. 1-8. 



1895. ? Daphnia Jtmnei, Stingelin, Die Cladoceren der Umge- 

 bung von Easel (Rev. Suisse de Zool., T. III.), p. 197, 



figs. 2, 3. 



1897. Daphnia ohtusa, Kurz, var, propinqua ; Richard, Revi- 

 sion des Cladoceres, Deuxieme partie (Annales des 

 Sciences ISTaturelles, 8e. Serie. Zool. T. II.), p. 262, 

 pi. XXI., figs. 11,19; pi. XXII., fig. 6; pi. XXIII., 



fig. 6. 



In general character intermediate between D. pulex nnd D. 



ohtusa. The lateral outline in the female is oval, the dorsal 



margin rather less boldly arcuate, than the ventral. Head well 



rounded in front, slightly 

 concave below, and form- 

 ing a continuous curve 

 with the dorsal margin 

 above, rostrum very short 

 and sharp; antennular 

 prominence very wide 

 and rounded ; spine short 

 and fringed with short 

 spinules, dorsal and vent- 

 ral margins of the shell 

 smooth or very slightly 

 spinulose behind the 

 middle. Eye large with 

 prominent lenses. Abdo- 

 men and post-abdomen 

 as in D. ohtusa. Shell 

 marked throughout with 

 a decussated reticulation. 

 Length, 2 mm. 



Fig. a. 

 Daphnia ohtusa, Kurz, var. propinqua, Sars. 



1. Female seen from right side x 28. 



2. Unguis of post-abdomen x 140. 



