On Fresh-water Entomostraca. 77 



Simocephalus gibbosus, G. O. Sars. 



Fig. 4 Ovigerous female, seen from left side; magnified 

 44 diameters. 

 » 5. Anterior part of body, more highly magnified 



(antennæ omitted). 

 » 6. Tail. 



PL III. 

 Moina australiensis, G. O. Sars. 



Fig. 1. Adult female, with the matrix greatly distended 

 with embryos, seen from left side; magnified 62 

 diameters. 



» 2. One of the antennulæ, more highly magnified. 



» 3. Leg of 1st pair. 



» 4. Extremity of tail. 



» 5. Ephippium from left side. 



» 6. Adult male, seen from left side; magnified 79 dia- 

 meters. 



» 7. Same, viewed from the dorsal face (rami of the 

 antennæ not drawn). 



» 8. Extremity of one of the antennulæ, highly magnified. 



» 9. Prehensile leg of 1st pair. 



» 10. One of the testes, with the efferent duct. 



» 11. Zoosperms very strongly magnified. 



Pi. IV. 



Moina tenuicomis, G. O. Sars. 



Fig. 1. Adult female, with the matrix distended by rather 

 fully developed embryos, seen from left side ; 

 magnified 62 diameters. 



