344 



INVERTEBRATE MORPHOLOGY. 



In the majority of forms it is a large sac occupying a con- 

 siderable portion of the apex of the visceral hump and ex- 



-f 



Ov 



FIG. 153. DIAGRAM OP BODY CAVITY OP Sepia (after GROBBEN). 

 bh = branchial heart. od = oviduct. 



/ = funnel. Ov ovary. 



go = reproductive opening into ccelom. p = pancreas. 

 H = heart. pa = partition partially dividing coe- 



i = intestine. loin. 



Ib = ink-bag. pc = coelora. 



I liver. s = stomach. 



Id liver-duct. Sh = shell. 



me = mantle cavity. u = external opening of nephridium. 



_ZV = nephridium. W == opening of nephridium into cce- 



lorn. 



tending ventrally a considerable distance, the more ventral 

 portion being incompletely separated from the more capacious 



