Part first. 



Fig. 15. Loligo vulgaris, 

 */2 na t- size. p. 78. 



2. Snails (p. 78). Sea-hare (Aplysia, fig. 16), soft black 

 or brown lumps as large as a man's fist. *Pleurobranchus 

 (fig. 17). ^Umbrella (fig. 18). Triton's horn (Tritonium, 

 fig. 19), with red body and yellow horns banded with 



Fig. 16. Aplysia limacina, 

 i/2 nat. size. p. 80. 



Fig. 17. Pleurobranchus testudinarius, 

 A /4 nat. size. p. 80. 



Fig. 1 8. Umbrella mediterranea, 

 1 o nat. size. p. 80. 



black; shell pointed, shaped like a whelk; *Tun (Dolium, 

 fig. 20), black and white body, rounded shell; Murex 

 fig. 21), much smaller, with spines; Helmet-shell (Cassis, 

 fig. 22); Natica (fig. 23). 



