Fig. 137. Male labovc) and female (fielow) of Daphina longispina. Note striking diffcrenceg as 

 regards a, antenna; br, breast (ventral anterior margin of carapace); bk, beak; ap, first thoracic 

 appendage. Sex intergrades may have any combination or intermediate condition of the male and 

 female characters shown. (After Banta.) 



