101 



r. Rectiun, 



r.f. Retractor Muscle of Foot. 



r.p. Retractor Muscle of Palette. 



r.s. Reti'actor Muscle of Siphons. 



s. Stomach. 



s.r. Supporting Rod of Gill Filament. 



s.s Sheath of Crystalline Sti/le. 



V. Visceral Gan.'::lion. 



vl. Valve of Anterior End. of Ventricle. 



v.c. Velai" Cavity. 



ve. Ventricle. 



v.k. Ventral Pivotal Knob . of the Shell Valve, 



v.m. Visceral Mass. 



