30 PROSOPEAS. 



ture oblique, elliptical; the right margin thin, acute, arcuate 

 above ; columellar margin callous, suddenly revolute. Length 

 14, diam. 3.5 mm. (Bens.). 



Port Blair, Andaman Is. (Major Haughton). Shan States, 

 Burmah (Fedden). Lampun, Siam (Daly). 



Spiraxis ivalkeri BENS., Ann. and Mag. N. H. (3 ser.), xi, 

 p. 90 (Feb., 1863). PPR., Monogr., vi, p. 189. HANLEY & 

 THEOBALD, Conch. Indica, pi. 79, f. 4. Opeas walkeri (Bens.). 

 THEOBALD, Journ. Asiat. Soc. Bengal, xxxix, pt. 2, 1870, p. 

 395 (Shan States). BLANFORD, Proc. Malac. Soc. Lond., v, 

 p. 280 (Siam). 



25. P. TURRICULA (v. Martens) . PI. 3, figs. 95, 96. 



Shell rimate, subulate, closely and finely striate, the striae 

 arching forward; with a silky luster, waxen. Apex obtuse, 

 subglobose. Whorls 8, the suture deep, the upper ones con- 

 vex, penultimate and last whorls more flattened, the last 

 noticeably tapering downwards. Aperture subvertical, piri- 

 form-oblong, the columellar margin nearly straight, a little 

 dilated, at the base attenuate, not truncate, narrowly reflexed 

 at the insertion. Length 15, diam. 4, length of aperture 5, 

 width 2 mm. (Martens). 



Siam (Mouhot), purchased in London in 1859-60 for the 

 Berlin Museum. 



Stenogyra turricula MARTENS, P. Z. S. Lond., 1860, p. 9. 

 Achatina t., PFR., Monogr., vi, p. 236. MORELET, Ser. Conch., 

 iv, p. 267, pi. 12, f. 3. Stenogyra turricula MARTENS, Ostas. 

 Zool., Landschn., p. 82, pi. 22, f. 7. Bulimus t., PFR., 

 Monogr., vi, p. 98. Opeas t., FISCHER & DAUTZ., Mission Pavie 

 Indo-Chine, iii, p. 411 (Muok Lek, Siam). 



"This species stands quite near 8. achatinacea Pfr., but on 

 comparison of original examples of both it is seen to differ 

 by the slimmer, less conic shape and finer striation. The 

 upper whorls in both are conspicuously more convex, the 

 penult, and last are swollen only under the suture, then the 

 slope becomes more rectilinear" (Martens). 



Prof, von Martens' first description (P. Z. S., 1860) was 

 based upon a larger specimen, length 18, diam. 6 mm., aper- 



