TROPIDOPHORA. 37 



7. OtOPOMA FOLITUM. 



Cyclost. politum Sow. Thes. Conch, i. 97. n. 18. t. 23. f. 17.'; Pfeiff, 

 Zeitsch. 1. c. 104. n. 6. ; Kuster, Chemn. Conch. Cab. i. 19. t. 21. 

 f. 13, 14. 



H a h. ? 



8. Otopoma pygm^um. 



Cyclost. pygmsBum Sow. Thes. Conch, i. 104. n. 39. t. 30. f. 253. ; 

 Pfeiff. 1. c. 105. n. 5. 



a. New Ireland. Presented by R. B. Hinds, Esq. 



9. Otopoma spurcum. 



Cyclost. spurcum Grot, (not Sow.) ; Pfeiff. 1. c. ] 04. n. 7. 

 Hab ? 



§§ Whorls keeled in front of axis, with a lip -like callus in axis, 



10. Otopoma Michaudi. 



Cyclost. Michaudi Grat. ; Pfeiffer, Kuster, Chemn. Conch. Cab. L 



19. t. 18. f. 14— 6, 

 Cyclost. carinatum Sow. Thes. Conch, i. 119 n. 83. t. 26. f. 117, 



118. (not Cyclost. carinata Lamck.) 

 Tropidophora Michaudi Pfeiff. Zeitsch. 1. c. 106. n. 13. 



a.—? 



19* TROPIDOPHORA. 



Operculum shelly, flat ; whorls from 4 to 5, gradually increasing. — » 

 Shell depressed, or highly turbinated, generally acutely keeled, 

 or strongly striated. Peristome simple, subcontinuous, reflexed, 

 often partially covering the axis. 



Tropidophora Troschel in Menke und Pfeiffer, Zeitsch. f. Malaki 

 1847, 44.; Pfeiffer in Menke und Pfeiffer, Z. f Malak. 1847, 

 106. 



§ Peristome simple, reflexed. Axis open. 



1. Tropidophora Cuvieriana. 



Cyclostoma Cuvierianum Petit, Rev. Zool. 1841, 184., Mag. Zool. 

 Moll. t. 55.; Reeve, Conch. Syst. t. 184. f. 14. t. 185. f. 24.; 

 Sow. Thes. Conch, i. 115. n. 72. t. 30. f. 218, 219.; Philippi, 



