PLATE 57 



la,lb,lc. Ceratozona rugosa Sowerby. 40 mm. p. 26. 



2a, 2b. Chiton marmoratus Gmelin. 2 inches, p. 26. 



3. Acanthochites spiculosus astriger Reeve. 20 mm. p. 24. 



4. Acanthochites floridanus Dall. 21 mm. p. 24. 



5. Acanthochites pygmaeus Pllsbry. 8 mm. p. 24. 



6. Chaetopleura aplculata Say. 1 inch. p. 23. 



7. Spisula solldlssima Dlllwyn. 6 Inches, p. 64. 



8. Chione intapiirpurea Conrad. Yamato, Florida. 35 mm. p. 53. 



9. Corbula swlftiana C. B. Adams. Palm Eeach, Florida. 9 mm. p. 67. 



10. Acteocina recta Orbigny. 2 mm. p. 139. 



11. Haminoea petitli Orbigny. 9 mm. p. 141. 



12. Murex tristichus Dall. Florida Strait. 10 mm. p. 115. 



13. Pomacea paludosa Say. Lantana, Florida. p. 147. 



14. Retusa pertenuis Mighels. bastport, Maine. 2.5 mm. p. 139. 



15. Clio pyramidata Linne. 15 ram. p. 144. 



16. Acanthochites hemphilli Pilsbry. Key West, Florida. Length 24 mm. p. 24. 



