FfG. 5. Astaciis fuciatilis. 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 ; aff, anterior gastric 

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

 portion of the stomach : ////, green glands ; 7>, heart ; Jiff, hind gut. 

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

 gastric muscles ; saa, superior abdominal artery ; f, testis ; vd, vas 

 deferens. 



