TR0PID0PH0RA. 39 



Cyclost. multicarinata Jay, Cat. of Shells, 122. t. 7. f. 78. 

 Tropidoph. ortyx Pfeiffer, 1. c. 107. n. 14. 



a — d. Persian Gulf. 



5. Tropidophora tricarinata. 



Helix tricarinata Muller, Hist. Verm. ii. 84. n. 282., Chemn. Conch. 



Cab. ix. 85. t. 126. f. 1103, 1104. ; Gmel. Syst. Nat. 3621. n. 34. 

 Turbo carinatus Wood, Ind. Test. t. 32. f. 125. 

 Cyclost. unicarinatum Sow. Thes. Conch, i. 120. n. 84. t. 26. f. 



119, 120. 

 Cyclost. tricarinata Lamck. An. s. Vert. vi. 144. 2nd edit. viii. 355. 



n. 6. 

 Cyclost. tricarinatum Potiez 8f Michaud, Gal. Moll. Douai, i. 242. 



n. 21. t. 24. f. 22, 23. 

 Tropidoph. tricarinata Pfeiffer, 1. c. 106. n. 12. 



a — c. Madagascar. 

 d, e. ? 



Var. 1 . Axis nearly completely closed by a callosity. 



Cyclost. bicarinatum Sow. Thes. Conch, i. 120. n. 85. t. 26. f. 



121.; Kuster, Chemn. Conch. Cab. i. 19. t. 19. f. 1—3. 

 Tropidoph. bicarinata Pfeiffer, 1. c. 106. n. 9. 



a — c. Madagascar. 



Var. 2. With only one keel. 



Cyclost. unicarinata Lamck. An. s. Vert. vi. 144. 2nd edit. viii. 355. 



n. 5. ; Desk. Enc. Meth. Vers, ii. 40. n. 4. t. 461. f. 1. a, b. 

 Cyclost. unicarinatum Potiez 8f Michaud, Gal. Moll. Douai, t. 243. 



n. 23. 

 Cyclost. obsoletum var. Sow. Thes. Conch, i. 120. n. 84. t. 26. f. 



125. ; Grat. Act. Soc. Linn. Bord. xi. 443. t. 3. f. 17. 

 Cyclost. madagascariensis Gray in Griffith's A.K. t. 28. f. 4. 

 Cyclophora madagascariensis Swainsori, Malac. 336. 

 Tropidoph. unicarinata Pfeiffer, 1. c. 106. n. 4. 



a. Madagascar. 



Yar. 3. With several keels. 



Cyclost. carinata Lamck. An. s. Vert. vi. 143. 2nd edit. viii. 354. n. 

 3., exclusive of synonymes, with exception of Desk. Enc. Meth, 

 Vers, ii. 40. n. 3. 



Hab. Madagascar ; fide Deshayes. 



Var. 4. 2-keeled ? 



Cyclost. campanulatum Pfeiffer, Kuster, Chemn. Conch, Cab. i. 19. 

 t. 18. f. 4. 6. 



