174 



Heredity. 



differ from each -other in this respect. The shape and 

 structure of the first antennas and of the abdomen may 



FIG. 3. Head of female specimen 

 of Branchippus Qrubei, greatly 

 enlarged, a. first antennae, b. 

 second antennae. 



FIG. 4. 



Head of the male of the 

 same species. 



FIG. 5. Head of male Branchippus 



stagnalis. 



FIG. 6. Head of male Artemia 

 salina. 



also show considerable modification in the males of vari- 

 ous species of Branchiopods. 



