ab. 



14. 



FIG. 59. ^stacus ftuviatiUs. Ventral (A, B, C, F) and lateral (D, E) views of the 

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

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

 the young crayfish when nearly ready to be hatched : in E, the carapace is 

 remoVed, and the limbs and abdomen are spread out. 1 14, the cephalic and 

 thoracic, appendages; all, abdomen; br, brunelme ; <\ carapace: cp, epipodite 

 of the first maxillipede ; gg, green gland ; h, heart ; Ib. labrum ; Ir, liver ; ra, 

 mandibular muscles. 



