- — owy. 



— f. 



Fig. 74 — Stages in the Life-history of Hamocera dana, One 

 OF THE MoNSTRiLLiD^. (FroiTi Lankcstcr's " Treatise on 

 Zoology," after Malaquin.) 



A, Free-swimming nauplius larva ; B, embryo after penetrating 

 into the body of the worm Sahnacina ; C, D, E, successive stages 

 in the body of the host ; F, free-swimming adult female. (All 

 greatly enlarged, not to same scale.) a' , Antennule ; br, brain ; 

 c^ nauplius eye ; /, swimming feet; g.s., hairs on which the eggs 

 are carried ; m, position of mouth ; md, hooked mandible of 

 nauplius ; n, nerve cord ; ov, mass of eggs carried by female ; ovy, 

 ovary ; pr^ absorptive processes. 



