172 I'BOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Diifc^rt a 77. Sar/'lii, Marts., testa multo magis dcprcssa, anfr. ultimo 

 distiiutiiis angulato, nulius moiubranaceo-costato, apertura multo ma- 

 joro, marginc columellari bievius triangularitt'r retlexo. 



Only one specimen was found, at Locluiba, on the Yangtze, about 

 half way between Ichang and Chunking. 



\Mulst H. Surclii in outline and form recalls a large Vitrina 

 pellucida, Miill., our species might be compared to Vitrina 

 diaphana, Drap. The largo aperture, the height of which exceeds 

 the height of the shell, and the sculpture, which consists of 

 membranaceous ribs, are specially characteristic. 



7/. plicatilis, Desh. (jS^ouv. Arch, du Mus. YI. p. 20, ix. t. ii. figs. 

 13-15), is the nearest ally, but is smaller, in spite of having four 

 whorls, and is comparatively higher. 



Scctio EunADRA, Pilsbry. 



8. Helix hemiclista, n.sp. PI. IX. Fig. 7. 



Testa sat magna, subobtecte umbilicata, tonuiuscula, brunnoa, 

 cpidermide dein olivacea obtecta, nnicolor, conoideo-globosa ; spira 

 conico-convexa, magis minusvo elata ; apex acutnlus. Anfr. 5-5^ 

 convexiuscxili sutura impressa disjuncti, lente accrcsccntcs, regulariter 

 arcuatim striati ; nltimiis insiiper spiraliter obsolete ruguloso- 

 lineolatus, pcripheria obsolete angulatus, basi bene rotundatus, ad 

 peristoma superne breviter constrictiis, sed non aut vix descendens, 

 circa f altitudinis testa3 pequans. Apertura obliqua, intiis fuscescens, 

 excisocircularis ; peristoma modice expansum, reflexiusculum, sub- 

 labiatum, labio violaceo-brunneo, marginibus remotis, callo tenuissimo 

 junctis, margine supero curvato, dextro et infero regulariter circu- 

 laribus, columellari sursum attcnuato, prope umbilicnm lobo magno 

 sphtrrico triangulari trans pcrforationem retlexo, aperturam umbilici 

 fere omnino obtegeiite. Diam. maj. 285-33, min. 24'5-28'5 mm; 

 alt. 18 5-22-5 mm. 



Three specimens were obtained by Mr. Bock's expedition of 1891, 

 and one by Mr Pratt, probably in Lytschouan. 



Nearly related to Helix hfcmatuzona, Heude CMoll. teiT. p. 40, t. xx. 

 fig. 14), from which it difi"i'rs in having tlie whorls more convex, the 

 last wlioii being more rounded !it tlie periphery, in not being banded, 

 and in the right margin not being angulated. 



9. Helix kenaltiana, Heude. 



Heude, Joiirn. de Conch. 1889, p. 226; Moll. terr. p. 141, t. 

 xxxviii. figs. 10, lOrt. 



This is another species nearly related to 77. hamatozona, easily 

 distinguishable, however, by its larger size, different sculpture, and 

 formation of the umbilicus. We are in possession of authenticated 

 sjjccimens of both II. ha;matozona and 77. renaltiana. 



10. Helix PEucrssA, Heude. 



Hende, Moll. terr. p. 39, t. xvi. fig. 4 ; Pilsbry, Man. of Conch. 

 Ti. p. Ill, t. xxi%\ figs. 8(5-88. 



We have before us an original specimen from Tclien k'eou, of diani. 

 maj. 28'(), min. 25"2, alt. 17 G mm., in wliich part of the narrow 



