33. H. POLiTA, (pi. ii. f. 76 to 81.) iiubis. Zuol, Proc. 1842. 



T. polita, tenui, pellucida, phis niinusve depressa et angulata ; 

 anfractibus supra sub-complanatis, infra ventricosis ; labio in- 

 terno tenui, antice pauhiium inflate; columella angustata ad basin 

 leviter angulata ; labio externo tenui, expanse, leflexo, supra 

 anguluin plus minusve depresso ; operculo interne rubro, externa 

 sub-margaritaceo. 



Smooth, tbin, transparent, more or less depressed and angulated ; 

 the whorls rather flattened above ; rather more ventricose beneath ; 

 inner lip thin, rather swelled near the columella ; columella narrow, 

 rather nngulated at the base; outer lip thin, expanded, reflected, 

 more or less depressed above the angle ; operculum red within, 

 pearly without, rather square. The principal varieties in size and 

 colour are shown in the plates. Brought by Mr. Cuming from the 

 Philippine Islands. 



31. H. siMiLis. (pi. iii. f. 130.) nobis. Zool. Proc. 1842. 



T. forma H. politse simillima, sed magis angulata, et leviter 

 striata. 



Presenting a medium between H. Guadaloupensis and H. polita, 

 from the latter of which it differs in being lightly striated, and 

 rather more angular. Guadaloupe. 



35. H. PARVA. (pi. ii. f. 82.) nobis. Zool. Proc. 1842. 



T. H. politae simillima, sed minori, magis globosa, et labio externo 

 vix reflexo. 



Between the more globose and small varieties of polita, and this 

 shell, it is diflieult to recognise the distinction, which, however 

 consists partly in the shape, and partly in the outer lip being less 

 reflected. Philippine Islands. 



36. H.GLOBULosA.(pl. iii.f. 127, 128.)D'Orb.Moll, Cub.p.294. 

 T. globosa, laevi, sub-tenui ; labio externo sub-exjianso, reflexo; 



columella acuta. 



Globose, smooth, rather thin; outer lip rather expanded, re- 

 fl.ected ; columella acute. Cuba. 



37. H. MAXIMA, (pi. i, f. ii.) Zool. Proc. 1842. 



T. gluboso-sub-depressa,laevi, alba ; apertura magna, semilunars, 

 margine reflexo, acuto ; labio interno sub-crasso ; columella obtuse 

 angulata. 



Rather more depressed than H. major, and the base of the colu- 

 mella angulated instead of being notched. 



38. H. AMBELiANA. (pi. i. f. L9, 26) De Roissy, Guerin. Mag. 

 Zool, CI. V. pi. 68. 



T. conica, laevi, spiraliter tenuissimse striata; apertura semi- 

 huiari ; labio externo crasso, reflexo, rotundato; operculo corneo. 



Rather conical, globose, nearly smooth, with the aperture semi- 

 lunar, and the outer lip thickened, reflected and rounded ; oper- 

 culum horny. Our shell, which has been named Texasiana and 

 Bulanderiana, in manuscript, agrees better with the figure pub- 

 lished in Guerin than with tbe accompanying description. 



Antilles and Texas. 



