WATER-BREATHING SNAILS. 



219 



Fig. 396. — Neri- Fig. 397 — Nerita. Fig. 398. — Trochus. Great- 

 tina. Pacific. Sinde. Britain. 



Fig. 399. — Ear-shell, or Fig. 400. — Gup-and- Fig. 401. — Keyhole 



Haliotis. Reduced. saucer Limpet. Limpet. West 



Great Britain. Philippines. Indies. 



Fig. 403. 



Fig. 402. — Violet Snail. Atlantic. Chiton. 



, raft ; *, egg capsules ; r, gills ; rf, tentacles and eye-stalks. New England. 



Fig. 404. — Rock Limpet, 



or Patella. 



New England. 



Fig. 405. — Toothshell. Fig. 406 — Crepidula New England. 



