Fig. 5. — Astaciis fiiriatiUs. — A male specimen, with the roof of the 

 carapace and the terga of the abdominal somites removed to show 

 the viscera (nat. size) : — aa, antennary artery ; arj, anterior gastric 

 muscles; anim,, adductor muscles of the mandibles; cs, cardiac 

 portion of the stomach ; pg, green glands ; Zf, heart ; hg, hind gut, 

 or large intestine ; Lr, liver ; oa, ophthalmic artery ; pg posterior 

 gastric muscles ; scat, superior abdominal artery ; /, testis ; vd, vas 

 deferens. 



