CHOANOPOMA 53 



23. Choanopoma xanthostoma. 



Cyclost. xanthostoma Sow. Thes. Conch, i. 144. n. 149. t. 29. f. 

 195. ; Pfeiffer, 1. c. 105. n. 47. ; Kuster, Chemn. Conch. Cab. 

 i. 19. t. 14. f. 6—8. 



a — c. Jamaica. From the Collection of Mr. Gosse. 



d- g . — ? 



24. Choanopoma cheorostoma. 



Cyclost. chlorostoma Sow. Thes. Conch, i. 146. n. 156. t. 28. f. 

 168. ; Pfeiff. 1. c. 106. 52. ; Kuster, Chemn. Conch. Cab. i. 19. 

 t. 14. f. 1—3. 



a, b. Demerara. From Mr. Bainbridge's Collection. 



§§ Lamellce of whorls of operculum, slightly prominent 

 * Last whorl of shell not separate from preceding. 



25. Choanopoma Humphreyanum. 



Cyclost. Humphrey sianum Pfeiff. Wiegm. Archiv. 1839, Zeitsch. 



f. Malak. 1846, 41. 

 Cyclost. Humphreyanum Pfeiffer, Zeitsch. 1847, 105. n. 46. ; 



Kuster, Chemn. Conch. Cab. 80 n. 74. i. 19. t. 10. f. 9—11. 

 Cyclost. pictum Sow. Thes. Conch, i. 142. n. 142. t. 28. f. 157, 158. 

 Cistula picta Humph. MS. ined. in Sow. 1. c. 



Near thysanoraphe. 



a — k. Jamaica. Presented by the Rev. Barham Zincke. 



I. ? From Mr. Powis's Collection. 



m. ? Running into C. thysanoraphe. From Mr. Powis's 



Collection. 



26. Choanopoma thysanoraphe. 



Cyclost. thysanoraphe Sow. Thes. Conch, i. 143. n. 145. t. 28. f. 

 162, 163. ; Pfeiff. 1. c. 105. n. 31. ; Kuster, Chemn. Conch. Cab. 

 81. n. 75. i. 19. t. 10. f. 16—18. t. 13. f. 28, 29. 



a—c. Jamaica. 



d, e. Jamaica. Presented by Prof. C. B. Adams. 



27. Choanopoma interruptum. 



Cyclost. interrupta Lamck. An. s. Vert. vi. 145. 2nd ed. viii. 356. 



n. 10. 

 Cyclost. interruptum Sow. Thes. Conch, i. 141. n. 141. t. 28. f. 



152, 153.; Pfeiffer, I.e. 104. n. 42. ; Kuster, Chemn. Conch. 



Cab. 63. n. 58. i. 19. t. 9. f. 1, 2. 



c 3 



