90 



those of the individual fig. 81, appear stronger, in consequence 

 of the varices being partly worn off. Brought from the Island 

 of Masbate, Philippines, by Mr. Cuming. 



28. Sc. DUBiA. (pi. xxxiii. f. 41.) Sow. Jun.Z. P. 1844. 



T. ventricosa, acuminata, minute striata : anfractibus sub- 

 prominentibus, sutura profunda distinctis, rapide crescentibus ; 

 varicibus numerosis, tenuibus, in medio anfractuum sub-ob- 

 soletis, ad suturam paululum expansis ; apertura magna, sub- 

 ovali ; labio externo tenui, labio interno sub-expanso : umbi - 

 lico parvo : colore albo. 



We have only obtained an imperfect specimen from Mr. 

 Cuming's cabinet, unaccompanied by any information. It 

 differs from Sc. Lyra in the thinness of the varices, which, 

 toward the centre of the whorls, are nearly obsolete ; in the 

 suture being less deep, and the whorls less less raised near it ; 

 in the varices being slightly spread in a web-like form at the 

 suture ; and in being spirally striated, and without colour. 



29. Sc. IRREGULARIS, (pi. xxxiii. f. 40, 60.) Soiv. Jun. 

 Z. P. 1844. 



T. ventricosa, acuminata, laevi ; anfractibus contiguis, ro- 

 tundatis, gradatim crescentibus ; sutura distincta, varicibus 

 tenuis, numerosis, inaequalibus ; nonnullis magnis; apertura 

 oblique ovali ; umbilico mediocri : colore albo. 



A ventricose, sharp-pointed species, with the whorls gra- 

 dually increasing in size, separated by a deep suture ; most of 

 the varices are very thin and numerous, with sharp edges, 

 with here and there one of thicker and larger size. The 

 umbilicus is of a middle size. The shell is generally white. 

 It is brought from Catanuan, Isle of Luzon, Philippines, by 

 Mr. Cuming. 



30. Sc. iNCONSPicuA. (pi. xxxiii. f. 53.) Sow. Jun. 



T. Sc. irregulari similima sed varicibus magis numerosis, 

 umbiUco minori; labio interno antice sub-angulato. 



The ribs are exceedingly numerous, regular and line ; the 

 umbilicus is smaller than in Sc. irregularis, which it other- 

 wise resembles, and the inner lip is reflected at the lower or 

 anterior part in the form of an angle. From West Indies. 



31. Sc. TRiFASCiATA. (pi. xxxiii. f. 42, 43, 44.) De Haen. 



T. ventricosa, brevi, Isevi ; anfractibus rotundis, paucis ; 

 sutura profunda : varicibus numerosis, inaequalibus, laminatis; 

 nonnullis duplicatis ; apertura oblique ovali, laliio interno, 

 reflexo, sub-expanso : umbilico mediocri : colore pallide fulvo, 

 lineis spiralibus tribus fucis rubescentibus,quarara mediani lata. 



