FOREGUT ANATOMY OF CRASSISPIRINE GASTROPODS 



ogre b, P bl ? 



73 



Fig. 19 Funajeffreysii (Smith. 1875). A. Semidiagrammatic longitudinal section of the foregut; B, longitudinal section of the prohoscis tip with a gripped 

 marginal tooth. 



Fig. 20 Inquisitor latifasciata (Sowerby, 1870). Longitudinal section of the proboscis and buccal mass in the retracted position. 



walls, which are equal in thickness to the proboscis walls. It is wide 

 after the intermediate sphincter, but then greatly reduced in diam- 

 eter, becoming wider posteriorly (on the drawing the narrowed part 

 of the buccal tube is somewhat shorter, than actual). The buccal lips 

 are small. 



Buccal mass and oesophagus 



The buccal mass lies within the proboscis and occupies about half 

 the proboscis length. It has rather thin walls and a broad inner cavity, 

 which shows no curvature. The oesophagus is greatly elongated 

 between the buccal mass and nerve ring, forming a long loop. 



