344 



INVEBTEBRATE MOBPHOLOOT. 



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

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



PiG. 153.— DiAGBAM OF BoDY CAVITY OF Sepia (after Gkobben). 

 ih = branchial heart. od = oviduct. 



/ = funnel. Ov = ovary. 



go = reproductive opening into ccBlom. p = pancreas. 

 S = heart. pa = partition partially dividing cce- 



i = intestine. lom. 



lb = ink-bag. pc = coelora. 



I = liver. s = stomach. 



Id = liver-duct. Sh = shell. 



mc = mantle cavity. u = external opening of nephridium 



N = nephridium. V- = opening of nephridium into cce- 



lom. 



tending ventrally a considerable distance, the more ventral 

 portion being incompletely separated from the more capacious 



