176 



Heredity. 



ified for discovering or holding the female. The 

 modification of the first antenna of the male for this 

 purpose is quite general, and a comparison of this part 

 in the males of various species of Cyclops (Figs. 7 and 8) 

 with the same part in a female (Fig. 9), shows how much 

 the males of allied species differ in this respect. The 

 second antennae, the maxillary feet, and the last pair of 



FIG. 9. Female specimen of Cyclops 

 canthocarpoides. 



FIG. 10. Female specimen of Noto- 

 delphys Allmani. 



swimming feet, are sometimes modified in the same 

 way in the male. In the male Saphirrina the wonderful 

 display of brilliant colors is due to the presence of 

 peculiar color-producing organs, which are absent in 

 the female. 



Among the parasitic Copepods we find a departure 

 from the ordinary typical structure, which is so remark- 



