cyclotus. 9 



15. Cyclotus rupestris. 



Pterocyclos rupestris Huttoris MSS. B. M.; Benson, 

 a, b. India. 



*** Whorls of operculum, very narrow. Peristome simple, re flexed. 



16. Cyclotus substriatus. 



Cyclost. substriatum Sow. Proc. Zool. Soc. 1843 — 61., Thes. Conch. 



i. 113. n. 67. t. 25. f. 35.; Pfeiffer, Kuster, Chemn. Conch. Cab. 



57. n. 51., i. 19. t. 7. f. 18—29. 

 Aper. substriatum Pfeiff. 1. c. 104. n. 21. 



a — c. Island of Siquijor. From the Collection of Mr. Cuming. 



17. Cyclotus exiguus. 



Cyclost. exiguum Sow. Thes. Conch, i. 112. n. 63. t. 25. f. 92. 

 Aper. exiguum Pfeiff. 1. c. 104. n. 23. 

 Hab. ? 



18. Cyclotus pusillus. 



Cyclost. pusillum Sow. Proc. Zool. Soc. 1843, 9., Thes. Conch, i. 

 94. n. 10. t. 23. f. 5. 5.*; Pfeiffer, Kuster, Chemn. Conch. Cab. 

 59. n. 53. i. 19. t. 7. f. 16—17. 

 Aper. pusillum Pfeiff. 1. c. 104. n. 22. 



a—f Isle of Lucon. From the Collection of Mr. Cuming. 

 g—i. Philippine Islands. Var. small. From the Collection 

 of Mr. Cuming. 



19. Cyclotus mexicanus. 



Cyclost. Mexicanum Menke, Synops. 1830, 135.; Sow. Thes. Conch. 



i. 112. n. 64. t. 25. f. 93.; Philippi, Abbild. und Beschr. Conch. 



i. 104. t. 1. f. 4.; Pfeiffer, Kuster, Chemn. Conch. Cab. 56. n. 



49. i. 19. t. 7. f. 21—22. 

 Aper. Mexicanum Pfeiffer, 1. c. 104. n. 10. 



a. Mexico. Presented by J. E. Gray, Esq. 



20. Cyclotus Pfeifferi. 



a. With operculum. ? Presented by J. E. Gray, Esq. 



21. Cyclotus? orbellus. 



Cyclost. orbella Lamck. An. s. Vert. vi. 148. 2d ed, viii 360. n*. 22., 

 Be Lessert, Pec. Coq. t. 29. f. 13.; Sow. Thes. Conch, i. 93. n. 7. 

 t. 23. f. 6.* 6.**; Pfeiffer, Kuster, Chemn. Conch. Cab. i. 19. t. 

 20. f. 4—6. 



A 5 



