1870.] Descriptions of new species of Diplommatince. 5 



rather solid ; spire conical, slightly convex ; whorls 5£, sides convex, 

 suture deep, penultimate whorl largest, last whorl strongly con- 

 stricted in front of the aperture, rising very slightly behind the 

 peristome, chiefly between the inner and outer peristome ; 

 aperture slightly oblique, sub-circular ; peristome double, inner 

 slightly expanded, scarcely thickened, terminating in a sinuation 

 at the base of the columella ; outer greatly produced, expanded, 

 continuous ; parietal callus thin, moderately extended ; columellar 

 tooth blunt, moderately developed. 



Height, 2f mm., diameter, 1% mm., diameter of aperture with 

 peristome, § mm. 



Habitat. — Locally plentiful in damp woods near Jawai, Jaintia 

 hills, at about 4500 ft. elevation ; — very rare in west Khasi Hills 

 where only one specimen was found. 



This species is very near D. gihbosa, from the same region, describ- 

 ed by Mr. W. T. B 1 a n f o r d, and thus affording a second instance 

 of a type intermediate between the dextral forms D. pachi/cheilus, 

 D. diphcheilus, &c, and the sinistral forms of the Solomon Isles, &c. 

 It is distinguished readily from D. gibhosa by its more regularly 

 ovate form, its costulation, and the even, non-sinuated margin of the 

 inner peristome. 



Since the transmission of specimens of Diplommatina, published 

 in the Journal for 1868, to Mr. W. T. B 1 a n f o r d, I have been 

 fortunate enough to discover this species again. As the above 

 quoted figure, on pi. iii, of the " Contributions to Indian Malacology, 

 No. IX." was taken^from a single shell, subsequently broken, the 

 species remained unfortunately unnamed and undescribed. D. 

 gibbosa I have found at Teria Ghat, but it is very rare in that 

 locality, so rich in genera of other land shells. 



6. Diplommatina parvula, n. sp. Pi. I, fig. 5. 



Shell dextral, ovate, tumid, depressed, thin ; colour bright corneous, 

 pale in some specimens, translucent, finely yet sharply costulated 

 throughout; spire oval, apex very flat, and blunt. Whorls 5, 

 with sides very concave, enlarging rapidly from the apex, ante- 

 penultimate the largest, body whorl ascends slightly within a 

 short distance of the peristome, suture deeply impressed ; aperture 



