Zoological Society. 65 



by the transverse lines on the lower part of the whorl. These lines 

 are remarkably parallel, regular and well-impressed, and in the four 

 specimens under examination are six in number. The folds are like 

 ribs, very numerous, closely set, and very distinct. The form of this 

 species, described above, is very like Tomatella, and the twist in the 

 columella also resembles that genus. The ribs continue on the apex 

 and give it a scalariform appearance. The aperture is nearly one- 

 half the length of the shell. The edge of the Up, below the emargina- 

 tion, is slightly crenulate. The columella is very- thick towards and 

 at the base, where it is so retuse as to permit the inside to be seen. 

 One of the specimens is rubiginose at the base. No operculum ac- 

 companied the specimens. 



Melania rudis. M. testd plicatd, subfusiformi, crassd, corned; 

 spird subelevcrtd ; suturis irregulariter impressis; anfractibus pla- 

 nulatis transversim lincis impressis cinctis, superne canaliculatis ; 

 plicis numerosis, crebris ; aperturd parvd, ovatd, intus albidd ; 

 labro superne emarginato ; columella Icevi, subcrassd, tortd. 

 Hab. Amboyna. 

 Length 1*1, diam. "4 of an inch. 



Remarks. — Allied to Melania tomatella, it forms one of the 

 emarginate group, but differs in the size of the aperture and in the 

 form of the ribs, which are transversely cut by numerous fine lines, 

 in groups, which lines traverse the whole whorls. The aperture is 

 about one-third the length of the shell, and the lip is crenulate. The 

 three specimens under examination are all truncate at the apex, and 

 the number of whorls therefore not ascertained. It has the spiral 

 operculum usual to Melania. 



Melania microstoma. M. testd plicatd, subfusiformi, subcrassd, 

 luteo- corned ; spird elevatd ; suturis irregulariter impressis; an- 

 fractibus octo, planulatis, transversim lineis impressis cinctis, su- 

 perne canaliculatis; plicis ?iumerosis, crebris; aperturd maximd, 

 ovatd, ad basi?n truncatd, intus ccerulescente ; labro superne emar- 

 ginato ; columelld Icevi, ad basim subcrassd tortdque. 

 Hab. Mountain streams, isle of Negros, Philippines. 

 Length '9, diam. - 3 of an inch. 



Remarks. — This belongs to the group with emarginate lip, along 

 with M. rudis and M. tomatella. It is a more slender species, more 

 subulate, and has a smaller aperture than either. It takes more the 

 form of Terebra. It has groups of lines which decussate the ribs as 

 in the rudis. The aperture is not one-third the length of the shell, 

 and the lip is crenulate. No operculum was received with the shells. 



Melania transversa. M. testd plicatd, pyramidatd, crassd, cor- 

 ned, castaneo-maculatd ; spird elevatd ; suturis irregulariter bnpres- 

 sis ; anfractibus subconvexis, transversim lineis impressis cinctis; 

 costellis verticalibus raris ; aperturd parvd, oblique transversd, 

 rhomboided, intus maculatd et ccerulescente ; labro terebrceformi, 

 crenulato ; columelld contortd, superne incrassatd, inferne emar- 

 ginatd. 

 Ann. § Mag. N. Hist. Ser. 2. Vol. ix. 5 



