92 



THE CRUSTACEA 



body is embedded. Three ramified processes grow out from the 

 head into the tissues of the host, and the region of the genital 

 somite l^ecomes enormously enlarged, forming the greater part of 



Lmwrrt hranrhiiili^. A, male ; B, female, at uopulatoiy statue C. I), later stages of temale 

 after attacliineiit to si^coiid liost. a', antennule ; a", antenna ; /', /'", first and fourth pairs of 

 swimming-feet; g, opening of spermatheca ; mxf, maxilliped ; ac, nauplius-eye ; ■■••j), spermato- 

 pliore sac ; t, testis. (After C'lau-i, from Korschelt and Heider's Kmhriinldii/i.) 



the vermiform body (Fig. 52, C, D). The swimming - feet arc 

 retained in a vestigial condition near the anterior end. 



In some other forms parasitic on fish (Lernaeopodidae, Chon- 

 dracanthidae) the male is attached to the female in a dwarfed 

 condition throughout life. The lai-va becomes parasitic in the 



