Fic. 59.—Astacus fluviatilis.—Ventral (A, B, C, F) and lateral (D, E) views of the 
embryo in successive stages of development (after Rathke, x 15). 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 EB, the carapace is 
removed, and the limbs and abdomen are spread out. 1—14, the cephalic and 
thoracic appendages; ab, abdomen; br, branchie; ¢, carapace ; ep, epipodite 
of the first maxillipede; gg, green gland; h, heart; lb, labrum; Ir, liver; m, 
maadibular muscles. 
