PROSOPEAS. 23 



shell with a smaller apex. Stenogyra eckelensis de Morg., of 

 Perak, bears a strong resemblance to this Enganio form" 

 (Henderson). 



18. P. PAIOENSE (Bock). PL 5, figs. 42, 43. 



" Shell elongate, subulate, imperforate, of a dirty grayish- 

 white color, covered with a somewhat deciduous and coarsish 

 olive epidermis. Whorls 12, apical ones obtuse, glossy, vit- 

 reous, these and the few succeeding rather convex and slowly 

 enlarging, the five last proportionally longer and flatter, in- 

 creasing more in length than breadth, and separated by a 

 rather oblique deepish suture. Sculpture consisting of coars- 

 ish, oblique, flexuous, indistinctly subgranose, raised lines of 

 increment. Aperture elongate, subpiriform, acute above, oc- 

 cupying rather more than one-fifth of the entire length of the 

 shell. Outer lip (viewed laterally) oblique, a little excurved 

 near the suture, simple, thin. Columella whitish, slightly 

 arcuate and thickened, appressed to the whorl, connected with 

 the extremity of the labrum by a very thin callosity. Length 

 40, diam. T 1 /^, aperture 9 mm. long, 3 mm. broad " (Bock). 



Sumatra : Paio, in the Padang district, 1,500 feet above the 

 sea (Bock). 



Bulimus (Stenogyra) paioensis Bock, Proc. Zool. Soc. 

 London, May, 1881, p. 630, pi. 55, f. 5. 



"The animal is of a yellowish color, has a short foot, and 

 carries its shell in an oblique position. 



"I never met with this interesting species in any other 

 spot in the highlands; and even at Paio it appeared to be 

 rare; for in all, after close search, I found but fourteen 

 specimens " (Bock). 



A specimen, probably one of the original lot, measures, alt. 

 33.8, diam. 6.5, length of aperture 9 mm. It is imperforate, 

 very thin, whitish-corneous, composed of fully 11 whorls. 

 The apex, though small, is obtuse and hemispherical, the next 

 4 or 5 whorls are convex, much wider than high, and increase 

 the diameter of the shell rather rapidly ; the last 4 whorls are 

 nearly flat, very high, and increase the calibre of the shell 

 very slowly. The sculpture consists of fine vertical riblets on 



