PLATE XXXIV. 



These figures arc from unpublished drawings by the late Dr. William Stinipson. 



Fig. 1. Olivella mutica Say ; a-g, varieties of form and color, natural size ; 

 h, operculum, natural size ; i, I, operculum outside and inside, mag- 

 nified ; m, animal crawling ; n, head, showing absence of eyes and 

 tentacles ; o, section of oral aperture, magnified : j)y penis ; r, sec- 

 tion of shell showing absorption of internal walls. Page 133. 



Olivella tnutica Say ; dentition. Page 133. 



Furipura floridana Conrad. c, animal from below, natural size ; 

 c?, head and verge from above. Page 217. 



Purpura floridana Conrad ; dentition. Page 217. 



Scaphella junonia Hvass. h, shell one half natural size ; c, sculpture 

 of early whorls ; d, nucleus ; c, section of shell. Page 148. 

 Volutomitra gronlandica Beck. Young shell and magnified nucleu.«i. 



Page 145. 

 Volutomitra gronlandica Beck. Rhachidian tooth ; a, from above ; 



h, in profile. Page 145. 

 Oliva litcrata. Lamarck, a, animal crawling, f ; J, tentacula and eyes ; 

 c, soft parts removed from the shell, showing (/) foot, (7) propo- 

 dium, {h) respiratory siphon, (?) vent, (T) posterior filament of 

 mantle, {m) mantle raised up, {n) verge, (0) gill ; d, section of muz- 

 zle showing proboscis extruded ; e, gill and sensory organ (osphra- 

 dium). Page 133. 



Oliva literata Lamarck. Dentition taken from a female specimen. 

 Page 133. 



