92 G- O. Sars. 



Gen. Scapholeleris, Schoedeler. 

 S. spinifera, Nicolet. Chili. 



Gen. Bosmina, Baird. 

 JB. coregoni Baird 1 (Ekman). Patagonia. 



Gen. Bosminopsis 3 Richard. 

 B. Deitersi Richard. Buenos Ayres. 



Gen. Leydigia, Schoedeler. 

 L. acanthocercoides Fischer. 2 ) Argentina. 



2 ) This is certainly not Baird's species. 



2 ) Some doubt may arise as to the correctness of this identi- 

 fication. 



