212 HELIX-CATHAICA. 



Helix subrugosa DH., Nouv. Arch, du Mus. ix, p. 14, t. 3, f. 25-28 

 (1873) ; /. c. x, p. 91. GREDLER, Mai. Bl. (n. F.) v, p. 173. 

 ANCEY, II Nat. Sicil. 1883, p. 5. H.(Cathaica) subrugosa MLLDFF., 

 Jahrb. 1884, p. 348, t. 7, f. 6. H. kalganensis MLLDFF., Jahrb. ii, 

 1875, 216. PFR. Monogr. vii, p. 588. H. buvigneri var. kalganen- 

 sis MLLDFF., 1. c. viii, p. 57. HILBER Sitzungsber., p. 334. 



Allied to H. buvigneri, but having a half whorl more, and not 

 dilated toward the aperture as that is. 



Var. kalganensis Mlldff. Differs only in being smaller. 



Kalgan, at the Great Wall. 



H. LUTUOSA Deshayes. PI. 48, figs. 26, 27, 28 (enlarged). 



Shell small, narrowly umbilicated, rather solid, whitish, covered 

 with a blackish cuticle ; opaque, rather depressed, discoidal ; spire 

 very short, apex obtuse. Whorls 5, narrow, convex, separated by a 

 deep suture, slowly increasing, the last whorl a little larger, convex 

 beneath, perforated by a small umbilicus. Aperture white, semi- 

 lunar, the peristome thickened within, expanded, wider below 

 partly closing the umbilicus. 



Alt. 4, greater diam. 7, lesser 6 mill. (Desh.) 



Near Peking (after a freshet). 



H. lutuosa DH., Nouv. Arch, x, p. 87 ; ix, t. 3, f. 18-21. 

 MLLDFF., Jahrb. 1884, p. 350. 



H. BUVIGNERI Deshayes. PI. 48, figs. 24, 25, 21, 22, 23. 



Shell narrowly perforated, the opening of the umbilicus of an 

 abnormal ovate form ; subglobose, rather depressed, white, opaque, 

 solid, delicately and irregularly striated. Spire short, conoid, the 

 apex obtuse. Whorls 5, narrow, convex, separated by a deep 

 suture, slowly increasing, the last a little larger, convex, slightly 

 deflexed at the aperture and suddenly dilated, produced in a tan- 

 gent in the umbilicus. Aperture scarcely oblique, subcircular, the 

 ends of the peristome approaching, margins strongly thickened, 

 outwardly expanded, the columellar margin dilated partly covering 

 the umbilicus. 



Alt. 7, greater diam. ] 0, lesser 7 mill. (D/j.) 



Peking (/), and Provinces Shandung, Houan, Shensi and Gansu, 

 China, living and in Loss. 



H. buvigneri DH., Nouv. Arch, ix, p. 14, t. 3, f. 22-24 ; x, p. 90. 

 MLLDFF., Jahrb. 1884, p. 350. HILBER, Sitzungs-Ber. p. 344, t. 



