Fig b9.—^stacui fluvlatilis.—X ntral (A, B, C, F) and lateral (D, E) views of the 

 embryo in successive stages of development (after Ratlike, x lu). A is a little more 

 advanced than the embryo represented in tig. 58, F : D, E, and F are views of 

 the young ci-ayfish when nearly ready to be hatched : in E, the carapace is 

 removed, and the limbs and abdomen are syiread out. 1 — 14, the cephalic and 

 thoracic appendages ; ah, abdomen ; hr, branchiae ; c, carapace ; ep, epipodite 

 of the first maxillipede ; gg, green gland ; h, heart ; Ih, labrum ; Ir, liver ; m, 

 niamlibular muscles. 



