It is difficult to distinguish this from H. dentigera, tlie surface, 

 however, is rather rougher, and the outer lip is scarcely reflected. 



Matauzas. 



17. H. MINIMA. ({j1. iii. f. 119.) D'Orb Moll. Cub. p. 240. 

 T. minuta, H. dentigerae simili, emarginalione minus valida. 



A minute shell, somewhat resembling the H. dentigera in shajie, 

 but the last whorl larger in proportion, and the notch less distinct. 



Cuba. 



Sec. 4. Spirally ribbed or striated, outer lip diffuse, columella 

 flattened or concave. 



18. H. PULCHELLA. (pi. i, f. 15, 16.) Gray, Zool. Journ. i. G4. 

 T. conica, sub-angulata, spiraliter costata ; costis distantibus, 



rugosis; labio externo expansOjXeflexo; columella lata, complanata. 

 Conical, rather angulated, with rugose, distant ribs, in a spiral 

 direction, with the outer lip expanded, reflected and confluent with 

 the columella; columella broad, flattened. 



19. H. Tankervillii. (pi. i. f. 17.) Gray, Zool. Journ. i. 250. 

 T. H. pulchellae simillima; sed majori; carina interrupts, in 



medio anfractuum ornata. 



Very much like H. pulchella, but larger, with an interrupted 

 keel, in the middle of the whorls. 



20. H. viRGiNEA. (pi. i. f. 18. and pi. iii. f. 114.) Lea. Obs. 

 T. H. pulchellae simili. sed crassiori, costis magis numerosis ; 



columella concava. 



Differing from H. pulchella in being thicker, having the ribs 

 closer and more numerous, the outer lip less expanded above, and 

 the columella rather hollow. 



21. H. GLOBOSA. (pi. i. f. 24.) Gray Beech. App. 



T. forma H. virgineae simili, anfractibus supra costatis infra 

 lapvibus. 



In this species, the upper part of the whorls only are ribbed, tlie 

 outer lip is less expanded, and the upper part of the whorl mure 

 elevated than in H. virginoa. 



22. H. COSTATA. (pi. i. f. 20.) Gray Zool. Journ. i. 66 



T. minuta, H. virgineae simili, sed costis paucis; columella 

 angustiori ; labio externo vix expanso. 



A minute shell, resembling H. virginea in shape, but with tlie 

 ribs larger and fewer in proportion, the outer lip scarcely ex^janded 

 and the columella narrower. 



Sec. 5. Globose ; outer lip confluent witfi tlie columella ; 

 inner lip tfiin. 



23. H. zoNATA. (pi. ii. f. 62, 63, 64.) H. fasciata, H. flava, 

 Spix; H. variabilis, Wagner. 



T. conica, sub-rhomboidea, leviter spiraliter costata ; anfractibus 

 angulatis, unicarinatis, ; carina altera, plus minusve distincta infra 

 unguium; apertura sub-quadrata ; labio externo expanso, supeine 

 depresso in medio attenuato, ad columellam sub-angustato. 



