PROSOPEAS. 31 



ture 5 mm., in which the columella was stated to be strongly 

 obliquely truncate. Morelet explains the discrepancy between 

 this statement and that in his second description (in the 

 Ostasiatische Landschnecken) by supposing that the shells 

 described differed in age, but really belong to one and the 

 same species. I am wholly inclined to believe that the differ- 

 ences are due partly to age, partly to different ways of de- 

 scribing the tapering base of the columella. 



Some authors have referred this species to P. ivalkeri Bens. 



26. P. TEREBRALE Theobald. 



Shell lengthened, imperforate, thin, corneous, not polished. 

 Whorls IQi/o, depressed-convex, joined by an impressed suture, 

 closely striate, the last whorl scarcely a third the total length ; 

 epidermis scabrous. Peristome acute, the columellar margin 

 very narrowly reflexed, slightly twisted. Length .95, diam. 

 .17, alt. aperture .22 inch (Theol).). 



Shan States (Fedden). 



Stenogyra (Opeas] terebralis THEOB., Journ. Asiat. Soc. 

 Bengal, vol. 39, 1870, pt. 2, p. 401. Bulimus t., PFR., Monogr., 

 viii, p. 133. HANLEY & THEOBALD, Conch. Indica, p. xi. 



27. P. TCHEHELENSE (de Morgan). PI. 4, figs. 7, 8, 9, 10. 

 Shell imperforate, turrited, pale yellowish-brown (or with 



a greenish tint where the soft parts show through) , lusterless. 

 Whorls 8y 2 , convex, the first !!/> smooth, whitish, the next 

 two sculptured with strong, rather widely and unevenly 

 spaced, arcuate, thread-like striae; subsequent whorls very 

 densely and finely striate, the striae arcuate. Last whorl 

 strongly tapering below the periphery. Aperture narrowly 

 ovate, the outer lip arched forward above the periphery, re- 

 tracted at its sutural insertion. Columella sinuous, concave 

 above, retracted at the base. 



Length 16, diarn. 4.5 mm., aperture 5 mm. (specimen). 



Length 23, diam. 5 mm., aperture 6 mm. (de Morg.). 



Malay Peninsula : Gunong Tchehel, in the Pluss valley, 300 

 meters elevation (de Morgan) ; Gunong Tnas, 3,000 ft. (Skeat 

 exped.) ; Perak, Belimbing, Ligeh, Biserat, Jalor (Skeat 

 exped.). 



