186 W. T. Blaiiford — Oonfrihutions to Indian Malacology. [No. 4, 



atquG lineis impressis minutis spiralibus siihdistantihus superne decussata 

 (nucleo subluevigata'), si!,htus Icsvior sed distincte decussato -striata. Spira 

 parum elevata depresso-conoidea,fere conoexa, apice ohtuso, sutiird linear i, 

 antice vix impressd. Anfr. 51-, sensim accrescentes, p>rimiflanulati, ultimi 

 eonvexiusculi, ultimus liaud descendens, suhtus convexus, modice injlafus, 

 sed infra carinam, nisi juxta aperturam, leviter compressus. Apeo^tura 

 ohliqua, angulafa-lunaris, intus livido-albida ; peristoma acutum, intus suh- 

 incrassato-lahiatmi, marginibus callo tenui junctis, columellari curvato, 

 breviter rejlexo. Diam. maj. 32, min. 29, axis 17 mm. Apert. 16^ mm. 

 lata, 13^ oblique alta. 



Hab. In moiitibus ' Burail Range' dictis, ad alt. 3000-4000 pedum, 

 in provincia ' Noxth Cachar' Bengaliffi orientalis (S". S. Godwin-Austen). 



Shell perforate, depressed, carinate, not very thin, having a greasy- 

 lustre, and a thick epidermis, tawny or j^ellowish brown, marked with ob- 

 lique raised strife of growth decussated by fine subdistant spiral impressed 

 lines above (the nucleus almost smooth), and with fainter radiating strite 

 and concentric impressed lines below. Spire but little raised, almost con- 

 vex, depressedly conoid, apex obtuse, suture linear at first, but slightly im- 

 pressed near the mouth. Whorls 51, gradually increasing, the inner nearly 

 flat above, the outer slightly convex ; the last not descending, convex and 

 moderately swollen below, but sliglitly compressed just below the keel, 

 except near the mouth. Aperture oblique, angulately lunate, a little 

 broader than high, pale livid within. Peristome sharp, with a slightly 

 thickened lip inside, the margins joined by a thin callus, columellar mar- 

 gin curved, reflected for a short distance at the perforation. Major diameter 

 1-26 inches, minor 1'14, axis 0'69, breadth of aperture 0-65, height (measur- 

 ed obliquely) 0'53. 



There is a very remarkable resemblance between this shell and that 

 described by me as Nanina Icoondaensis (J. A. S. B., 1870, xxxix, pt. 2, 

 p. IG, pi. iii, fig. 12), yet I am by no means sure that both belong to the 

 same section or subgeneric group. N. Icoondaensis is an ally of N. indica 

 (Pfr.) and iV. sliiplayi, shells doubtless nearly allied to Semiplecta, and 

 very possibly belonging to that subgenus, but hitlierto referred to Botula * 

 or to other sections. O. sylvicola is larger, more solid, and covered with 

 a distinct epidermis, and the sculpture is less granulate above, the spiral 

 impressed lines being more distant. 



I have seen hut one specimen of O. sylvicola, for which I am indebted 

 to Col. Godwin-Austen. It is figured here. Other specimens, I learn, are 

 larger. 



* StoUczka, J. A. S. B., 1871, xl, pt. 2, 231. 



