PLATE S 8 



1. Cerlthlopsis metaxae Delia Chlaje. 



2a, 2b. Cerlthlopsis subiilata Montagu. 



3. Triphora perversa nigrocincta C. 



4. Triphora melanura C. B. Adams. 



5. Triphora turris-thomae Dillwyn. 



6. Cerlthlopsis greeni C. B. Adams. Sanibel, Florida. 5 mm. p. 105. 



7. Cerithium floridaniom Morch. 1.5 inches, p. 106. 



8. Cerithium variabile C. B. Adams. 18 mm. p. 106. 



9. Cerithidea costata Da Costa. 9 mm. p. 107. 



10. Cerithium algicola C. B. Adams. 20 mm. p. 105. 

 11a, lib, lie. Cerithium literatim Born. 20 mm. 



12. Cerithium muscarum Say. Florida. 



13. Cerithium eburneum Brugulere. 25 



14. Blttium alternatum Say. 7.5 mm. 

 15a. Cerithium atratum Born. 1 inch. 

 15b. Same. Porto Rico. 23 mm. p. 106. 



16. Cerithidea turrita Stearns. Tampa Bay, Florida. 10 mm. p. 107. 



17. Cerithidea aguayoi Clench. Texas. 22 mm. p. 106. 



18. Modulus angulatus C. B. Adams. Fox Bay, Colon. 13 mm. p. 104. 



19. Littorina guttata Philippi. Jamaica. 8 mm. p. 99. 



20. Tectarius trochiformis Dillwyn. Key West, Florida. 16 mm. p. 100. 



21. Cerithium minimum Gmelin. Florida. 15 mm. p. 106. 



22. Sella adamsl H. C. Lea. Florida. 10 mm. p. 105. 



23. Cerlthlopsis virginica Henderson and Bartsch. 2.9 mm. p. 105. 



24. Cerithium lutosum C. B. Adams. Palm Beach, Florida. 9 mm. p. 106. 



25. Bittium cerithiodes Dall. 3 mm. p. 107. 



26. Uargarites olivacea Brown. New England. 6 mm. p. 80. 



27. Blttium varium Pfeiffer. Florida. 5 mm. p. 107. 



28. Ancistrosyrinx elegans Dall. Florida reefs. 27 mm. p. 134. 



2se 



