728 MR. G. F. ANGAS ON NEW HELICES. [Dec. 2, 



stome grisatrc, reflechi et epaissi. Je donne le nom a cette Clau- 

 silie de la localitc ou cette espece a ete trouvee. 



44. GUESTERIA BRANICKII, n. Sp. 



Envoye'e par M. Stolzmann en 1878 de Tambillo, dont la descrip- 

 tion va incessamment paraitre dans le 'Bulletin' de la Societe Zoolo- 

 gique de France. 



EXPLANATION OP THE PLATES. 

 Plate LV. 

 Figs. 1-3. Helix (Systrophia) pseitdo-planorbis, p. 719. 



4-6. {Isomera) stolzmanni, p. 720. 



7, 8. Bulimus {Porpkyrobaphe) wrzesniowshii, p. 721. 



Plate LVI. 

 Figs. 1, 2. Bulimus {Orphnus)jch7cii, p. 722. 

 3, 4. Clausilia taczanowsJcii, p. 726. 



5-7. slosarskii, p. 726. 



8-11. filocostulata, p. 727. 



12-15. chacaensis, p. 727. 



3. Descriptions of two new Species of Helix (Eurycratera) 

 from S.E. Betsileo, Madagascar. By George French 

 Angas, C.M.Z.S., F.L.S., &c. 



[Eeceived October 27, 1879.] 

 (Plate LVII.) 



Helix (Eurycratera) betsileoensis, n. sp. (Plate LVII. 



figs. 1, 2.) 



Shell broadly umbilicated, depressedly ovate, rather solid, somewhat 

 shining, irregularly transversely rugosely striated on the last whorl, 

 the upper whorls finely and distinctly granulated, the last faintly 

 keeled at the periphery, dark-olive brown, spotted here and there 

 with greenish yellow, darker below the keel, with very indistinct 

 indications of bands above it, upper whorls greenish yellow, spire 

 flatly convex, apex depressed ; whorls 3|, rapidly increasing ; base 

 tumid and convex around the wide umbilicus ; aperture very oblique, 

 quadrately ovate, interior pearly grey, under the lens very minutely 

 shagreened ; peritreme thickened and slightly reflexed, columella a 

 little expanded over the umbilicus, coarsely granulated along the 

 entire inner surface, margins united by a callus. 



Diam. maj. 3 poll. 3 lin., min. 2 poll. 6 lin., alt. 1 poll. 6 lin. 



Hah. S.E. Betsileo, Madagascar. 



Larger and more elongated than H. guesteriana, Crosse, with a 

 tumid base and a wide umbilicus ; this species wants the malleated 

 sculpture so remarkable in H. guesteriana, as well as the second 

 dark raised ridge above the periphery. It differs also from H. cornu- 

 g'ujanteum in shape, the latter being rounder with a flattened base and 

 a small umbilicus. 



