Fig. 37.—Astacus fluviatilis.—Appendages of the left side of the abdo- 
men (x 3). A,the posterior face of the first appendage of the male ; 
B, the same of the female ; C, posterior, and C’, anterior faces of the 
second appendage of the male; D, the third appendage of tl e male; 
E, the same of the female ; F, the sixth appendage. a, the rolled 
plate of the endopodite - 5, the jointed extremity of the same ; dp., 
basipodite ; cx.p., coxopodite ; vn.p., endopodite ; ex.p., exopodite. 
