11 



Depressed, conical, finely striated in both directions ; whorls 

 angulated, with a keel in the middle, above and below which 

 they are slightly rounded ; aperture rather trapezoidal; columella 

 slightly callous, making a rounded outline at its union with the 

 outer lip ; outer lip much expanded, strongly reflected, and 

 lengthened at the angle. Almada, 



52. H. AGGLUTiNANs, (pi. ii. f. 83, 84, 85.) nobis. Zool. Proc. 

 1842. 



T. depressa, angulata, obtuse carinata, supra infraque aequaliter 

 convexa, minute concentrice striata, apertura quadrilaterali ; labio 

 interno tenuissimo ; columella triangulari, complanata, sub-umbi- 

 licata, ad basin obtuse angulata ; labio externo effuso, reflexo, 

 postice leviter depresso ; operculo sub-crasso, irregulariter quadri- 

 laterali; epidermide aliquando,per adhesionem rupium particularum 

 in carinam latam prseruptam producta. 



This shell is found on rocks, the decomposed particles of which 

 are agglutinated to the epidermis in some specimens so as to form 

 a broken keel on the angle of the whorls. Found by Mr. H. 

 Cuming in the Philippine Islands. 



53. H. Lazarus, (pi. ii. f. 91.) nobis. Zool. Proc. 1842. 



T. H. agglutinanti simillima, sed raagis elevata, columella 

 angustiori. 



Very much like H. agglutinans, but more elevated and the 

 columella narrowed. Taken on the leaves of palms by Mr. 

 Cuming in the island of Luzon, Philippines. 



54. H. viRiDis. (pi. ii. f. 67.) Lam. Hist. Nat. vi. 103. 



T. leevi, tenui; anfractibus angulatis, carinatis, supra et infra 

 rotundatis ; labio externo tenui, expanso ; columella sub-callosa. 



Our figure is taken from the Zoological Journal. The specimen 

 cannot now be found. 



55. H. CANDEANA. Qpl. iU. f. 97, 99.) D'Orb. Moll. Am. Mer. 



No. 17. 



T. depressa, laevi ; anfractibus angulatis in medio valde cari- 

 natis ; labio externo expanso, reflexo, in medio sub-acuminato, 

 attenuato ; operculo corneo. 



This shell resembles H. Carocolla, but is smooth, with the 



outline rather more rounded, the outer lip less expanded, and 



pointed upwards in the centre. Bay of Honduras. 



56. H. CARINATA. (pi. ii. f. 60. and pi. iii. f. 96.) D'Orb. Moll. 



Am. Mer. p. 360. 



T. forma H. Candeanae simili, spiraliter obsolete distanter 

 striata ; columella sub-complanata, triangulari ; labio externo 

 crasso, rotundato ; carina obsoleta, infra carinam central!; operculo 

 corneo. 



Like H. Candeana in form; spirally, obsoletely and distantly 

 striated; columella rather flattened, triangular; outer lip thick, 

 rounded ; with an obsolete keel under the central one ; operculum 

 horny. Brazil- 



