ALYCiEUS. 27 



17. Leptopoma multilabre. 



Cyclost. multilabris Lamck. An. s. Vert. vi. 148. 2nd ed. vlii. 360. 



n. 24. ; De Lessert, Recueil, t. 29. f. 14. ; Quoy et Gaim. Voy. 



AstroL ii. 183. t. 12. f. 20—22. 

 Cyclost. atricapillum (pars olim) Pfeiffer, Kuster, Chemn. Conch. 



Cab. 20. n. 12. 

 Lept. multilabre Pfeiffer, 1. c. 109. n. 19. 



Ha b. ? 



18. Leptopoma acuminatum. 



Cyclost. acuminatum Sow. Thes. Conch, i. 138. n. 133. t. 30. 



f. 235.; Pfeiffer, Kuster, Chemn. Conch. Cab. i. 19. t. 13. 



f. 11, 12. 

 Lept. ? acuminatum Pfeiffer, 1. c. 108. n. 1. 



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



§§§ Conical depressed. Whorls acutely keeled. 



19. Leptopoma helicotdes. 



Cyclost. helicoides Grat. ; Pfeiffer, Kuster, Chemn. Conch. Cab. 



i. 19. t. 15. f. 25, 26. t. 16. f. 1—3. var. 

 Cyclost. Stainforthii Sow. Zool. Proc. 1842, 82., Thes. Conch, i. 



136. n. 129. t. 29. f. 215, 216. t. 30. f. 217. 

 Lept. helicoides Pfeiffer, 1. c. 109. n. 20. 



a — g. Philippine Islands. From the Collection of Mr. 

 Cuming. 



20. Leptopoma acutimarginatum. 



Cyclost. acutimarginatum Sow. Thes. Conch, i. 124. n. 95. t. 27. 



f. 138, 139.; Pfeiffer, Kuster, Chemn. Conch. Cab. i. 19. t. 15. 



f. 19, 20. 

 Lept. acutimarginatum Pfeiffer, I.e. 109. n. 21. 



a — d. China. From the Collection of Mr. Cuming. 



8. ALYOEUS. 



Operculum horny, many-whorled. — Shell conical, spire regular. 

 Last whorl distorted, compressed, much contracted before the 

 mouth. Mouth circular. Peristome regularly reflexed. 



Alycagus Gray 31 S. B. M. 

 Cyclophorus sp. Pfeiffer, 1. c. 



B 2 



