54 LIST OF CYCLOPHORHLE. 



Cyclost. ambigua Be Lessert, Recueil, t. 29. f. 5. ; Reeve, Conch. 

 St/st t. 183. f. 8. 



a — c. ? 



Var. Small. 



Turbo Chemnitzii Wood, Cat. Supp. t 6. f. 6. 



Cyclost. Chemnitzii Gray in Wood's Cat. Supp. 36. ; £010. Thes. 



Conch, i. 141. n. 140. t. 28. f. 155, 156.; Pfeiffer, 1. c. 106. n. 



58. ; Kuster, Chemn. Conch. Cab. 92. n. 88. L 19. t. 32, 33, 



a — c. ? From the Collection of Mr. Powis. 



d. ? 



** Last whorl separated from the preceding. 



28. Choanopoma lincinellum. 



Cyclost. lincinella Lamck. An. s. Vert. vi. 148. 2nd ed. viii, 359. n. 



21. 

 Cyclost. lincinellum Sow. Thes. Conch, i. 140. n. 137. t. 28. f. 150, 



151. ; Pfeiffer, Kuster, Chemn. Conch. Cab. i. 19. t. 21. f. 3—5. 

 Turbo compressus Wood, Cat. Supp. t. 6. f. 42. 

 Cyclost. compressum Gray in Wood's Cat. Supp. 36. 

 Cyclost. lincina Lamck. Enc. Meth. t. 461. f. 2. a, b. 

 Choanopoma lincinella Pfeiffer, 1. c 107. n. 4. 



Hob. Jamaica. 



29. Choanopoma semiproductum. 

 a, b. ? 



23. DIPLOMMATINA. 



Operculum shelly, thin ; whorls few, with thin prominent lamella? 

 on their external edges. — Shell thin, subovate ; whorls convex, 

 last subascendent. Mouth nearly circular. Peristome double, 

 outer expanded. 



Diplommatina Benson, Ann. and Mag. Nat. Hist. 1849, 193. 

 Carychium (sp.) Hutton MS. 

 Bulimus sp. Pfeiffer, Helicida, ii. 81. 



§ Apex elongate, conical. 

 1. Diplommatina polliculus. 



Diplommatina folliculus Benson, Ann. and Mag. N. H. 1849, 194. 

 Carychium costatum Hutton MS. Brit. Mus. 

 Diplommatina folliculus Pfeiffer, Mon. Helicidce, ii. 81. 



