210 HELIX-CATHAICA. 



Provinces Gansu and Sytshuan, or Yunnan, China. 



Helix gredleri HILB., Sitzungsber., p. 342, t. 3, f. 5 (1882). IT. 

 stoliczkana HILB., 1. c., 1883, p. 1353, not of Nevill H. ( Cathaica) 

 gredleri MLLDFF., Jahrb., 1884, p. 345. 



Larger than H. stoliczkana, with higher spire. 

 H. HEUDEI Hilber. PI. 29, figs. 92, 93, 94. 



The shell is widely and deeply urabilicated, moderately depressed, 

 the upper three whorls (in ray example) are brownish, the lower 

 three white. Two narrow chestnut-brown bands encircle it. The 

 irregular oblique riblets, as well as their interstices, are finely 

 striated, and reach into the umbilicus ; there is besides a fine spiral 

 grooving. Spire moderately raised, the apex flat, whorls 5. Aper- 

 ture obliquely oval ; peristome reflexed and white. 



Alt. 11, greater diarn. 17, lesser 14 mill. (Hilb.) 



Helix (Fruticocampylaea') heudei Hilb., Sitzungsber. p. 343, t. 3, 

 f. 6. 



Resembles H.pratensis Pfr. and H. narzanensis Kryn., especially 

 the former. The peculiarities of this species are the closeness of its 

 two bands, the strong deflection of the last whorl, and the lack of a 

 lip within. 



H. GIRAUDELIANA Heude. PL 47, figs. 87, 88, 89. 



Shell umbilicated, discoidally compressed, whitish, marked with 

 oblique strise above, straight beneath. Spire flat, whorls 4, flat, 

 carinated, separated by a simple suture. Last whorl very convex 

 beneath, not descending. Aperture lunar, peristome simple, 

 slightly reflexed, the outer margin straight ; umbilicus moderate, 

 perspective. 



Alt. 4, greater diam. 10, lesser 8 mill. (#".) 



Yerkalo, on the upper Mekong River. 



Helix giraudeliana HDE., Moll. Terr. Fl. Bleu, p. 22, 1. 14, f. 12. 



More depressed than H. brevispira or H. cavimargo. Has been 

 found only fossil, in the left bank of the Mekong, on the boundary 

 between China and Thibet. 



H. ORYTHIA Martens. PI. 48, figs. 96-99. 



A species found fossil in the Loss (Pleistocene) of the Prov. 

 Houan, China. See Martens, Sitz.-ber. Ges. Naturf. Freunde 

 Berlin, May, 1879, p. 73, and Centralas. Moll. p. 12, t. 2. f. 12, 13. 



