169 



DESCRIPTIONS OF SOME CHINESE LAND-SHELLS. 



By B. ScHMACKER and De. 0. Boettger. 



Read June 8th, 1894. 



PI. VIII. Figs. 4 and 8, PL IX. Figs. 2, 7, and 8. 



CLATJSILIA, Drap. 

 Sub-sectio Euph^dusa, Bttg, 



1. Clausilia crobtlodes, Schm. and Bttg. 



Schmacker and Boettger, Nachr. Bl. d. d. Mai. Ges. 1890, p. 30. 



As we have pointed out {I.e.), C. cylindrella, Heude,' from Talifu, 

 in the province of Yiimian, is the nearest ally to our species. On 

 examination of a typical specimen, we find that in Heude's species the 

 second whorl is higher than it is wide, and considerably higher than 

 the third whorl ; the aperture is less oblique than in our species. 

 The lamella inferior extends horizontally so far to the left, that a line 

 drawn from the lamella superior vertically downwards would just 

 touch it, while in C. crohylodes it would pass by without touching it. 



The specimen has 11^ whorls, and measures 15 x 2-75 mm. ; it is 

 therefore less slender than the dimensions given by Heude (18 X 2*5 

 mm.) would lead one to suppose. 



2. Clausilia grobylodes, Schm. and Bttg., var. medioglabra, n. var. 

 DifPert a typo {cf. Schmacker and Boettger, Nachr. Bl. d. d. Mai. 



Ges. 1890, p. 30) testa majore, anfractibus 11 magis planatis, ad 

 suturam minus convexis, penultimo minus distincte striate, striis 

 subobsoletis vel obsoletis, peristomate magis expanse, distinctius 

 sublabiato ; lamellis inter se magis approximatis. Alt. 16'5-17*5 mm.; 

 diam. max. 3'5-3'75 mm. ; long, apert. 3, lat. apert. 2-5 mm. 

 Hah. — Near Ichang, province of Hupeh. 



3. Clausilia bdccinella, Heude. 



Heude, Journ. de Conch. 1886, p. 300; Moll, terr., p. 160, t. xxxv. 

 fig. 10. 



This species, of which we have before us an authenticated specimen, 

 differs from C. crohylodes, Schm. and Bttg., in having only 9 whorls, 

 which are twice as distantly costulated ; the penultimate one is more 

 distantly and more strongly costulated than the others. The 

 aperture is more solute, is vertical, and ovoid, whilst in C. crohylodes 

 the aperture is oblique and pear-shaped. The lamella superior is 

 stronger and much longer than in C crohylodes, whilst the lamella 

 inferior runs out on the interlamellar space in two very small plaits. 



1 Journ. de Concli. 1886, p. 301 ; MoU. terr., page 159, t. xxxv. fig. 11. 



