PLATE 57 



la,lb,lc. Ceratozona rugosa Sowerby. 40 mm. p. 23. 



Sa,gb. Chiton marmoratus Gmelln. 2 Inches, p. 23. 



3. Acanthochites splculosus astrlger Reeve. 20 mm. p. 24. 



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



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



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



7. Splsula solidlsslma Dlllwyn. 6 Inches, p. 64. 



8. Chlone Intapurpurea Conrad. Yamato, Florida. 35 mm. p. 53. 



9. Corbula swiftiana C. B. Adams. Palm Beach, Florida. 9 mm. p. 67. 



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



11. Hamlnoea petltii Orbigny. 9 mm. p. 141. 



12. Murex trlstichus 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 Linn^. 15 mm. p. 144. 



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



