FIG. n6.-AstaCUS fiuviatilis, dissection from the ri-ht side. an. antcnnary 

 artery ; ab. abdomen ; an. anus ; b. d. bile duct ; bf. 4, cheliped ; bin. ventral 

 nerve-cord ; cs. cardiac division of stomach ; ctk. cephalothorax ; em. dorsal 

 muscles ; fin. ventral muscles ; g. brain ; h. heart ; hd. large intestine ; 

 Ir. liver ; md. small intestine ; o. ostium ; oa. ophthalmic artery ; oaa, 

 superior abdominal artery ; ae. gullet ; //. / jr, pleopods ; //. 6, uropod ; j>s. 

 pyloric division of stomach ; sa. sternal artery ; t. testis and telson ; uaa. in- 

 ferior abdominal artery ; I'd. vas deferens ; ido. male genital aperture. (From 

 Lang, after Huxley.) 



