306 ACHATINID.E. 



regularly tapering to the obtuse, smooth apex, sculptured with- 

 narrow, spaced, thread-like riblets which curve forwards above the 

 periphery and are much weaker below it. Whorls slightly more 

 than seven, moderately convex. The aperture is long, the outer 

 lip arched forward above, and the columella reflexed narrowly,, 

 leaving a narrow umbilical fissure. Length 13-3, diam. 4-5, length 

 of aperture o'O mm. 



" This form seems to differ from P. achatlnaceion by its larger 

 aperture." (Pilshy.) 



Nevill also was of opinion that it differed from the latter (Hand 

 List, i, 1878, p. 173). 



Morch records a variety /5 from Kamorta, Katchal, as smaller,, 

 rather smooth, lengtli 11, width 9, length of aperture 5 mm., and 

 a var. y, from iSTancouri, as rather solid, length 13, width 4^^ 

 length of aperture 4 mm. 



332. Prosopeas roepstorfti, March (era.). 



Jiidiinus {Prosopeas) roe})storJi, Morel), Journ. Conchvl. 1870, p. 358.. 

 Stenogyva (Prosopeas) roepdo)-ffi, Nevill, Ilaiul List, i, 1878, p. 17-3. 

 Stenoifyra {Opens) r6pstorJi,V^<i\iXe\- k Clessin, Nomencl. llelic. Viv. 



1881, p. 320. 

 Prosopeas roepstorfi, Pilsbry, Mau. Couch, ser. 2, xviii, 190G, p. 27,. 



pi. 3, figs. 97-99. 



Oriqlnal description: — '■ Stenor/i/ra elonc/aiida, " Pfr.," Martens^ 

 1. c. [Preuss. Ex]). 0.st-Asien, Zool, ii, 1867] p_. 379, t. 22, f. 12, 

 affinis, sed differt : T. straminea, costulato-striata, suturis pro- 

 fundis ; apertura dilatata, t'ere ficiformi, faucibus albis, columella 

 torta, imperforata. 



"Long. 22.4 inillim., diam. G; long, apert. 7.;^." (Morch.) 



Hah. Xicobar Islands (/S7oZifr/t«); li^movi^ {Roepstorff); Little 

 Coco Island ( Wood-Mason). 



The species remained uuillustrated until ProF. Pilsbry figured 

 a specimen. It contains " nearly 8 whorls, the first globose 

 and smooth, the rest moderately convex and sculptured with 

 forwardiv arcuate, thread-like striae. The aperture is quite 

 oblique, long and narrow, the thin outer Up arched forward, the 

 columellar lip narrowly reflexed above and imperfectly appressed. 

 The columella is concave, slightly folded at the upper insertion. 

 Length 10, diam, 4-7, length of aperture 5-2 mm." 



Genus ZOOTECUS, Westerhuid. 



ZootecHs, Westerlund, Fauna Palaarct. Biuneucoucliyl. iii, 1887,. 

 pp. 3, 75 ; Martens, Arch. Xaturo;. Ixi. 1895, 1, p. 10;B, pi. 8, 

 tiff.*. 5, 6 (jaw and radula, Stenoc/yra insu/aris), figs. 7, 8 (St. 

 p7dla) ; Pilsbry, Man. Couch, ser. 2. xviii, 1906, p. 104. 



Ckilo(/ymnus, J omsenume, Mem. Soc. Zool. France, vii, 1894, p. 289^ 



Shell rather small, pale or white, perforate, pvjnform, cylindrie 



