b LIST OF CYCLOPHORID.E. 



Cyclotus Guild, in Swains. Malac. 1840, 186.; Gray, Syn. B.M. 



1842, 9., Proc. Zool. Soc. 1847, 182.; Hermann. Ind. Gen. Moll. 



i. 350. 

 Aperostoma Troschel, Zeitsch. f. Malah 1847, 44. ; Pfeiffer in 



Menke und Pfeiffer s Zeitsch. f. Malah. 1847, 104. 

 P. Poteria Gray, Syn. B.M. 1840. 



§ Whorls in front of the axis rounded. 

 * Wholes of operculum very narrow. Peristome nearly straight. 



f Whorls of shell near suture simple. 



1. Cyclotus giganteus. 



Cyclostoma giganteum Gray, MS. Brit. Mus. ; Sow. Proc. Zool. 

 Soc. 1843, 30., Thes. Conch, i. 92. n. 5. t. 23. f. 8, 9.; Pfeiffer, 

 Kuster, Chemn. Conch. Cab. 11. n. 2. i. 19. t. 1. f. 11—14.; 

 Reeve, Conch. Syst. t. 184. f. 17. 



Cyclost. Cumingii ? Jay, Cat. of Shells, t. 7. f. 4, 5. 



Aperostoma giganteum Pfeiffer, Zeit. Mai. 1847, 104. n. 1. 



a. Adult. S. America. 



b. St. Elena, W. Columbia. Adult ; weathered. Presented 



by R. B. Hinds, Esq. 



2. Cyclotus cingulatus. 



Cyclost. cingulatum Sow. Thes. Conch, i. 93. n. 9. t. 29. f. 213, 

 214.; Pfeiffer, Kuster, Chemn. Conch. Cab. I 19. t. 22. f. 20— 

 22. 



Aperostoma cingulatum Pfeiffer, 1. c. 104. n. 2. 



Hab. New Granada. 



3. Cyclotus Inca. 



Cyclost. Inca UOrb. Mag. de Zool. 1835, 29., Amer. Merid. 361. 



t. 16. f. 21—23. ; Sow. Thes. Conch, i. 92. n. 6. t. 24. f. 71, 72. ; 



Pfeiffer, Kuster, Chemn. Conch. Cab. xii. n. 3. 1. 19. t. 1. f. 5— 



7. 

 Cyclost. Blanchetianum Moricand, Mem. de Geneve, vii. 1836, 



442. t. 2. f. 21—23. ; Potiez et Mich. Gal. de Douai, 233. t. 23. 



f. 21, 22. ; Lamck. An. s. Vert. 2d. edit. viii. 366. n. 29. 

 Cyclost. nobile Fer. Mus. (fide Potiez et Mich.) 

 Aper. Inca Pfeiff. 1. c. 104. 48. 



a— e. Bolivia, Yungas. 



4. Cyclotus brasiliensis. 



Cyclost. Brasiliense Sow. Thes. Conch, i. 92. n. 4. t. 23. f. 7. ; Pfeiffer, 

 Kuster, Chemn. Conch. Cab. i. 19. t. 12. f. 13—15. 



