HELIX 



MOLLUSCA. 



1. Helix. View of the entire animal killed by immersion for two days in warm water. Shell: 

 head ; the two superior or oculiferous tentacles ; the two inferior tentacles ; foot ; thickened edge of 

 the mantle ; apex of the shell ; mouth of the shell ; pore of the mucous gland of foot. 



2. The animal after removal of the shell viewed from the right side. Head;' foot; surface of mantle 

 covering the visceral hump ; mantle-fold, at the junction of the visceral hump with the head and foot ; 

 circular respiratory orifice leading into the pulmonary sac ; anus ; genital pore ; columella (or spindle) 

 muscle; visceral hump containing liver and hermaphrodite gland. 



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