114 HELICIDJS. 



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 minute 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 (Plectopylis) andersoni, Blanford, P. Z. S. 1869, p. 448 ; 



Godwin-Austen, ibid. 1874, p. 612, pi. 74, fig. 9 (armature) ; 



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



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



vii, 1889, p. 323. 

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



figs. 8. 9. 

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



1887, p. 161, pi. 34, fig. 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 (Chersaecia) andersoni, Gude, op. cit. vi, 1899, p. 148. 



Original description : " Testa dextrorsa, latissime umbilicata, 

 discoidea, solidula, albida, epidermide crassula 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 angulatus, subtus 

 tumidus et circa umbilicum pervium, omnes anfractus rnonstran- 

 tem, obtuse compressus, pone aperturam leviter decendens, juxta 

 peristoma constrictus. Apertura perobliqua, rotundato-lunaris ; 

 peristoma album, undique expansuin, superne ad extremam peri- 

 pheriam leviter angulatim porrectum, marginibus lamella curvata, 

 ad ambas extremitates incisa junctis, lamina intranti nulla. Janna 

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

 vertical! parietali, 4 palatalibus horizontalibus, harum tribus in- 

 ferioribus versus extremitates altioribus, medio humilibus, postice 

 subbifidis, una basali etiam horizontal! simplici constans. 

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

 Hob. Upper Burma : Bhamo, Ava (Anderson, Fea) ; Yunnan : 

 Hoetone (Anderson). 



