SEPIA. 



279 



into the stomach, in which it is mixed with the digestive 

 juices from the digestive gland and pancreatic caeca. 



It may be noticed that the anus is not at the hind end 

 of the body, but the intestine is bent forwards along the 

 under surface till the whole alimentary canal is U-shaped, 

 with a ventral flexure. 



Fig. 197. — Dissection of Organs of Sepia Officinalis from 

 THE Left Side. (Semi-diagrammatic.) {Ad nat.) 



In its natural position, the cuttle rests suspended in the 



'ater near the surface with the body horizontal, the tentacles 



hanging loosely downwards, the two long ones 



being coiled up inside the others. A forward 



swimming motion is caused by undulations of the two lateral 



fins. A powerful backward jerk is produced by forcible 



ejection of water through the siphon. There are special 



muscles for moving the tentacles and the eyes. 



Fig. 198.— Ventral View of Shell of Cuttle. 



The inner part is calcareous, outer horn5% 



