ENTOMOSTRACA COLLECTED IN NATAL. 181 



Alona g'uttata G. 0. 8ar.s. Var. parvula Kurz. 

 Sars loc. cit., p. 51, PI. IX, figs. 3, 3a. 

 Both of these Alonte occurred in the Richmond gathering's, 



Genus Alonella G. 0. Sars. 



Alonella clathratula G. 0. Sars. 



Alonella clathratula Sars, loc. cit., p. 62, PI. X, 

 figs. 5, 5a. 



Taken at Richmond with tlie two species of Alona. 



Alonopsis ? sp., PI. XXXI, figs. 14, 15. 



A species probably referable to this genus occurred in the 

 Richmond nettings. Onl}' one specimen Avas seen. 



Genus Leydigia Kiirz. 



Leydigia propinqua G. 0. Sars, PI. XXXI, figs. 12, 13. 



1893. Leydigia acanthocercoides Sars on 'South 

 African Entomostraca raised from Dried Mud,' p. 18, PI. I\^, 

 figs. 1-4. 



1903. Leydigia propinqua Sars, 'Fresh-water Ento- 

 mostraca from China and Sumatra,' p. 14 (separate copy), 

 PI. I, figs. 4, 4a. 



1904. Leydigia africana Gurneij, "Fresh-water Ento- 

 mostraca from South Africa" (' Proc. Zool. Soc. Lond.'), 

 p. 300, PL XVIII, figs. 5, 6. 



Professor G. 0. Sars remarks respecting this species : 

 " Having now, through the kindness of Professor Lilljeborg, 

 had an opportunity of examining Swedish specimens of the 

 true L. acanthocercoides Fischer, I find that the South 

 African form described by me under tliis name is in reality 

 specifically distinct, for which reason I propose for it the 

 above name. It difi^ers not only in the shape and sculpture 

 of the carapace, but also in the much smaller size of the 

 ocellus, which scarcely exceeds that of the eye, whereas in 



