10 



round; outer lip widely expanded, flat, narrow at the base of the 

 columella. Matanzas, Cuba. 



46. H. rupestris (pi. iii. f. 120.) Pfeiffer. Wiegmann Arch. 

 furNaturgesh. Band i. 1839. 



" T. conica, subtus convexiuscula, vitrea, spiraliter striata ; an- 

 fract. 5 disjunctis, ultimis sub-angulatis ; callo columellari obsoleto ; 

 apertura Integra, ovata." Operculo tenuissimo, flavo. 



A small yellow conical shell, slightly striated in both directions, 

 the aperture somewhat square, the outer lip scarcely reflected, and 

 the operculum fitting to the margin. Matanzas. 



47. H. sloanu. (pi. iii. f. 102.) D'Orb. Moll. Cub. p. 248. 



T. trochiformi, angulata, sub-carinata ; striis spiralibus, distanti- 

 bus, cincta, labio externo reflexo ; operculo corneo. 



Trochiform, angulated, with an obtuse keel in the centre of the 

 whorls, and distant, spiral striae; outer lip reflected; operculum 

 horny. Cuba. 



Sec. 7. Shell carinated, outer lip confluent with the columella. 



48. H. acutissima (pi. ii. f. 92 to 95, and pi. iii. f. 133.) nobis, 

 Zool. Proc. 1842. 



T. plus minusve depressa, concentrice leviter striata, angulari, 

 acutissime carinata ; infra angulum paululum complanata; apertura 

 triangulari ; labio interno tenuissimo ; columella sub-complanata ; 

 ad basin sub-undata ; labio externo acuto, valide reflexo, expanso, 

 supra angulum sub-depresso. 



More or less depressed, concentrically and finely seriated, angu- 

 lar, very sharply keeled, rather flattened under the angle; aperture 

 triangular; inner lip very thin; columella rather flattened, rather 

 undulated at the base ; outer lip sharp, widely reflected and ex- 

 panded, above the angle rather depressed. Varies much in colour, 

 as will be seen in the figures. Brought by H. Cuming from the 

 Philippine Islands. 



49. H. Trochiformis. (pi. ii. f. 90.) nobis, Zool. Proc. 1842. 

 T. lutea, Helicinse acutissimse simillima, sed spira altiori. 



It differs from acutissima in being more conical. Found on 

 the leaves of palms, or on mountains in the Isle of Negros by H. 

 Cuming. 



50. H. Oxystoma. (pi. iii. f. 139.) Gray, Beech, App. 

 T. H. acutissimae simili, sed crassiori ; labio interno valido. 

 Not having seen the shell, we are uncertain of its distinctness ; 



it appears from the figure, however, to be more solid and more 

 distinctly conical than H. acutissima, with the inner lip thickened. 



Bahia. 



51. H. Carocolla. (pi. ii. f. 88, 89.) Moricand. Mem. Coq. 

 terr. et fluv. 



T. depressa, conica, tenuissime decussata ; anfractibus angu- 

 latis, in medio carinatis, supra et infra paululum inflatis; apertura 

 sub-trapezoidali ; columella sub-callosa ; labio externo valide ex- 

 panso, reflexo, in medio sub-attenuato. 



