576 



Records of the Indian Museum. [Voi,. VIII, 



Subfamily DIPLOMM ATININ AE. 



Diplommatina perobesa, Preston. 



(Text- fig. 4 A.) 



DipluDiinatiiia perobesa, Preston, Rec. Ind. Afiis., VIII, p. 540, fig. 5 (1915). 



Locality.— 'Upper Rotung, Abor Expedition, M "^-'r' Ind. Mas. 

 (5. W. Kemp); no. 3139, Brit. Mas., same locality {Capi. Oakes, 

 R.E.). 



Original description. — "Shell obliquely ovate with exserted 

 "spire, pale flesh colour, solid, opaque; whorls 7, the first two 

 " submammillary, the third, fourth and fifth regularly increasing, 

 "the sixth large, tumid, the last contracted and abandoning the 

 "direction of the axis of the shell, sculptured with coarse, obso- 

 " lete, oblique, transverse costulae ; suture well impressed; colu- 

 " mella margin vertically descending, bearing a strong, down- 







^ CD 



I*'iG. 4 A. — Diploiiuiiatina perobesa, Preston. X S. 



4 B. — ,, miici'onatiis, n. sp. X S. 



4 C. — ,, nciitulits, n. sp. X 8. 



4 D. — ,, iiiin'eitsis, n. sp. X 8. 



wardly bent, entering lamella above, sharply angled at the base, 

 diffused above into a thick, outwardly expanded, well defined, 

 parietal callus which joins the upper margin of the labrum and 

 gives to it a continuous appearance ; labrum consisting of an out- 

 wardly expanded and slightly reflexed, shelf-like projection from 

 which springs an erect, rather thick rim; aperture subcircular. 



"Alt. 4*5, diam. maj. 2*5 mm. Aperture alt. i"25, diam. 1*5 

 (nearly) mm. 



"Hab. — Upper Rotung, at an altitude of 2000 ft., under 

 stems of plantain trees (5. IF. Kemp)." 



Diplommatina mucronatus, n. sp. 



(Text- fig. 4 B.) 



Locrt///y.— Chanjuk La, Tsanspu Valley, x 2g°-i5', h. 95° 20' 

 {Capt. G. F. T. Oakes, R.E.). 



Shell ovately acuminate, rimate ; sculpture regular, some- 

 what distant costulation on the 4th and 5th whorls, l)ecoming 



