1 5 2 Quat ierlv Journal of Conchology. 



blending with the labrum, which is slightly effuse at the base. 



The generic characters not being applicable to all the species, 

 Mr. Smith proposes that " those species with the whorls strength- 

 ened with varices (generally tumid) and the columella more or less 

 truncated (for this character is variable) shall constitute the genus 

 Alaba proper; while those devoid of varices and wanting the col- 

 umella truncation may form the subgenus Diala." The subgenus 

 Styliferina, A. Adams, is closely associated with the preceding 

 group, the chief difference being in the apex "vertice mucronata." 



Mr. Smith considers that Diala rufilabris, A. Adams, should be 

 placed in the genus Hydrobia, differing from Diala in the contin- 

 uous peristome, very much thickened everywhere, and the oblique 

 aperture and columella. 



Dr. Leith, with whose name the species D. Leithii is associated, 

 has supplied Mr. Smith with the following notes on the living 

 animal — "Lip somewhat proboscidiform, not used in progression 

 and not usually projecting beyond the edge of the foot. Tentacles, 

 two, long, subulate or filiform, bearing the eyes on their outer side 

 near the base. Foot, much expanded in front and rounded, grad- 

 ually attenuated posteriorly and caudated. Reptation not by 

 alternate movements of right and left sides, but by an uniform un- 

 dulating, progressive motion of the foot. It moved also in an in- 

 verted position along the surface of the water, as Planorbis and 



Lymnoea do." 



<xx> 



Description of new land and freshwater Shells 

 from India. — By Sylvanus Hanley, F.L.S. 

 P.Z.S., 1875, pp. 605—7. 



Cyelophorus ophis, Hani. Tenasserim. 

 Ampullaria Tlieobaldi, Hani. Bhamao, Birmah. 

 Achatina ( Glessula) senator, Hani. Cottyam Hills. 

 A. (G.) isis, Hani. " Hab. Indiam meridionalem." 

 Unio vulcanus, Hani. "Hab. Birmah, vel Pegu." 



