PROSOPEAS. 21 



narrowly rounded, columellar margin vertical, somewhat 

 thick, tapering below and rapidly passing into the basal mar- 

 gin, outwardly expanded in a distinct parietal callus, leaving 

 an extremely narrow umbilical fissure. Length 31, diam. 8.5, 

 aperture 10x5 mm. (Marts.) . 



Lombock Island (Fruhstorfer). 



Stenogyra discernibilis MARTS., Sitzungsber. Ges. natur- 

 forsch. Freunde, Berlin, 1896, p. 162. E. A. SMITH, Proc. 

 Malac. Soc. Lond., iii, p. 30, pi. 2, f. 13 (fig. of type). 



"The height (length) of the visible part of the penult, 

 whorl, on the back, has the proportion of 5:7!/2 to its width. 

 The upper five whorls in grown examples are worn, dull and 

 whitish, but in younger ones they are as glossy and yellow 

 as the following ones. S. lanceolata Pfr. of Natal seems the 

 most similar species of those known to me. " 



By its smooth early whorls this form might be a typical 

 Prosopeas y but the sculpture of the later ones is not typical. 



12. P. LOMBOCKENSE (Smith). PI. 6, fig. 75. 



Shell lengthened, slightly rimate, buff-gray, obliquely 

 painted with white hydrophanous streaks, sculptured with 

 delicate, close, subgranulous growth-lines. Spire elongate, 

 very obtuse at the apex. Whorls 8, the upper three closely 

 and strongly costulate, convex, the rest a little convex, parted 

 by an oblique suture, the last whorl lengthened, a little nar- 

 rowed in front. Aperture elongate, acute above, one-third 

 the total length; lip thin, arched forward in the middle, the 

 margins joined by a thin parietal callus; columellar margin 

 straight, narrowly reflexed. Length 26, diam. 8 mm. (Smith). 



Lombock Island (A. Everett). 



Stenogyra lombockensis E. A. SMITH, Proc. Malac. Soc. 

 Lond., iii, p. 29, pi. 2, f. 14 (April, 1898). 



"Differs from S. discernibilis Martens in sculpture, color, 

 etc. The fine costulse on the protoconch exhibit a very pretty 

 crenulated appearance at the suture. ' ' 



13. P. ACHATINACEUM (Pfeiffer). PI. 5, figs. 40, 41. 



Shell imperforate, long-turrited, solid, closely, rudely stri- 



