160 THE SPINY DOGFISH— THE SKATE 



and the liver is attached to the front wall by the suspensory or falciform 

 ligament. 



Cut through the alimentary canal in front of the stomach and behind the 



Opening of Oviducts 

 Gall bladder-, ,„_s3;5^=^^^^=^ssss-,^ .Bile duct 



Liver 



Dorsal aorta- 



Fio. 53. — The Skate (Saia). Dissection showing the alimentary system, etc. 



rectal gland. Remove it completely by carefully cutting through the mesenteric 

 attachments. 



Open the whole canal by making an incision along the right side, and wash 

 out the contents. Examine the spiral valve. 



