46 IIELIX §. 20. 



vertice sublili; sutura distincte rnarginata; anfr. Sy^ vix con- 

 vexiusculi, sensim accrescentes, ultimus latior, non descendens, 

 subdepressus, peripheria rotundatus; apertura parum obliqua, 

 late lunaris; perist. simplex, rectum, marginibus subconver- 

 gentibus, columellari breviter descendente, superne anguste re- 

 llexo. — Diam. maj. 15^2, min. 13, alt. 7 mill. (Mus. Cuming.) 



Helix Malaccana Pfr. in Proc. Zool. Soc. 1854. p. 147. 

 — — Reeve Conch. ic. n. 1373. t. 195. 



Nanina Malaccana (Xesta) Pfr. Vers. p. 120. 

 Habitat «Province of Quedo, Straits of Malacca» (Gapt. Martin). 



266. H. convallata Benson. 



T. vix perforata, convexo-depressa., tenuis, nitidissima, 

 radiato-striatula, translucens, olivaceo-cornea; spira convexius- 

 cula, apice prominulo obtuso; sutura profunde canaliculata; 

 anfr. 6 convexi, lente accrescentes, prope suturam acute angu- 

 lati, ultimus rotundatus, non descendens, subtus convexius- 

 culus; apertura vix obliqua, lunata, intus submargaritacea ; 

 perist. acutum, rectum, marginibus subconvergentibus, dextro 

 superne prope suturam angulato, antrorsum leviter arcuato, 

 columellari oblique descendente, expansiusculo. — Diam. maj. 1 4, 

 min. 11 V2, alt. 7 mill. Apert. 7 mill. lata, 5 alta. (Mus. Benson.) 

 Helix convallata Bens. in Ann. and Mag. N. H. 2 d. ser. XVIII. p. 250. 

 _ _ pfr. Novit. conch. I. n. 227. t. 36. f. 14 — 16. 



Habitat in valle Tenasserim imperii Birmani (W. Theobald). 



267. H. Aglaja Pfr. 



T. subclause perforata, depressa, tenuis, laevigata, niti- 

 dissima, pellucida, fulvo-succinea ; spira vix elevata, vertice 

 subtili; sutura linea rufescente marginata; anfr. 6 convexius- 

 culi, lente accrescentes, ad suturam plicatuli, ultimus non de- 

 scendens, rotundatus, basi medio excavatus; apertura parum 

 obliqua, regulariter lunaris; perist. simplex, rectuni, marginibus 

 distantibus, columellari superne subcalloso, anguste reflexo. — 

 Diam. maj. 13, min. 11, alt. 6 mill. (Mus. Cuming.) 



Helix Aglaja Pfr. in Proc. Zool. Soc. 1854. p. 289. 

 _ _ Reeve Gonch. ic. n. 1396. l. 199. 



Nanina Aglaja (Xesta) Pfr. Vers. p. 120. 

 Habitat Bornoo, Sarawak. 



268. H. vallicola Pfr. 



T. perforata, depressa, laevigata, nitida, pellucida, fusco- 

 cornea ; spira vix elevata ; sutura impressa, submarginata ; 

 anfr. o vix convexiusculi , sensim accrescentes , ad suturam 

 strialuli, ultimus non descendens, peripheria rotundatus, basi 



