PHYLUM MOLLUSCA 



261 



(. Sucker 



Hectocotylhed arm. 



Cartilage 



Siphon 



Anus 



Muscle 



Esophaaus 



Rectum 



Inkiac 



Anb. aorta 



5yitemic heart— - 

 Pen 



^ Lt. post cava 



J Spermabophoric sac 



rl\ stomach 



:-il Pen - 



Skowach- 



po'uch 



-Cub edge of 

 body wall 



.Fir) 



Fig. 149. — Dissection of squid to sliow internal anatomy. 



