114 HELICID^. 



support posteriorly above and below, and giving off anteriorly at 

 the lower extremity a short horizontal fold ; above this are two 

 free longer horizontal folds, the upper one rising close to the 

 vertical plate, the lower one longer and rising a little further from 

 the vertical fold. A minute denticle occurs between the second 

 and third horizontal folds, and a horizontally elongated denticle 

 above the upper extremity of the vertical fold ; a very thin slight 

 fold runs near to and parallel with the lower suture, uniting with 

 the ridge at the aperture (see fig. 54 c, which shows the parietal 

 wall with its folds). The palatal armature is in two series, the 

 anterior one consisting of four elongated horizontal folds, the 

 second and third being separated by a wider space than the 

 others, while the posterior series is composed of thirteen or four- 

 teen miuvite denticles arranged close together, some a little 

 elongated. The shell figured is in the British Museum. It 

 measures — major diam. 8, minor 6"5 mm. ; alt, 4*5. mm. 



102. Plectopylis andersoni, Blanford. 



Helix (Plectopylii) andersoni, Blanford, P. Z. S. 1869, p. 448 ; 



Godwiu-Austen, ibid. 1874, p. (il5, pi. 74, fig. 9 (armature) ; 



Nevill in Anderson, Zool. Res. Two Exped. West. Yunnan, i, 



1878, p. 876 ; Tapparone Cauefri, Ann. Mus. Civ. Geneva, ser. 2, 



vii, 1889, p. 323. 

 Helix anderso7ii, Hanley & Theobald, Conch. Ind. 1875, pi. 112 



figs. 8. 9. 

 Helix (Atopa (Plectopylis)) andersoni, Tryon, Man. Concli. ser. 2, iii, 



1887, p. 161, pi. 34, fip-. 71, pi. 35, figs. 74-75. 

 Plectopylis andersoni, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 146 ; 



Gude, Science Gossip, n. s. iii, 1896, p. 154, fig. 17. 

 Plectopylis (C/tersaecia) andersoni, Gude, op. cit. vi, 1899, p. 148. 



Original descrlpllon : — " Testa dextrorsa, latissime umbilicata, 

 discoidea, solidula, albida, epidermide ci"assula fusca, interdum ad 

 peripheriam laciniatim fimbriata, induta, sub epidermide decussato- 

 striata, lineis spiralibus supra distinctis, infra subobsoletis. Spira 

 plana, apice vix prominente, sutura subimpressa. Anfr. 7^-8, 

 angusti, arete convoluti, supra planulati, infra in umbilico con- 

 vexiusculi, ultimus superne ad peripheriam angidatus, subtus 

 tumidus et circa umbilicum pervium, omnes anfractus monstran- 

 tem, obtuse compressus, pone aperturam leviter decendens, juxta 

 peristoma constrictus. Apertura perobliqua, rotundato-lunaris ; 

 peristoma album, uudique expansum, superne ad extremam peri- 

 pheriam leviter augulatim porrectum, marginibus lamella curvata, 

 ad ambas extremitates incisa junctis, lamina intranti nulla. Janiia 

 interna remota, ad ^ anfractuum ab apertura sita, e plica unica 

 verticali parietali, 4 palatalibus horizoutalibus, harum tribus in- 

 ferioribus A^ersus extremitates altioribus, medio humilibus, postice 

 subbifidis, una basali etiam horizontali simplici constans. 

 " Diam. maj. 26, min. 23, alt. 8^ mill." (Blanford.) 

 Ilah. Upper Burma : Bhamo, Ava {Anderson, Fea) ; Yunnan : 

 Hoetone {Anderson). 



