240 Mr. Lubbock on the Freshwater Entomostraca. 



rather larger than the other two put together. The males have 

 five segments. In both sexes the abdomen is terminated by two 

 short lamella?, each bearing five long plumose hairs. 



EXPLANATION OF PLATE XV. 



Fig. 1. Cypris Brasiliensis, mihi, outline. 



2. Cypris Australis, mihi, outline. 



3. Diaptomus Brasiliensis, mihi j second pair of antennae. 



4. Diaptomus Brasiliensis, third pair of maxiilipeds. 



5. Diaptomus Brasiliensis, first pair of natatory legs, male. 



6. Diaptomus Brasiliemis, left leg of the fifth pair natatory legs, male. 



7. Diaptomus Brasiliensis, right leg of the fifth pair natatory legs, male. 



8. Diaptomus Brasiliensis, fifth pair natatory legs, female. 



9. Daphnia Brasiliensis, mihi, outline. 



