HELIX-CATHAICA. 205 



lunate-oval ; peristome a trifle expanded, having a strong white lip 

 within, often subdentate on the straight basal margin. 

 Alt. 8i, diam. 15 mill. 



China. 



Helix pyrrhozona PHIL., Abbild. ii, p. 2, Helix t. 6, f. 4. PFR. 

 in Cpnchyl. Cab., t. 79, f. 7-9 ; Monogr. i, p. 350 REEVE Conch. 

 Icon., t. 85, f. 455. MARTENS, Ostas. Landconch. p. 48. ADS., 

 Am. Mag. N. H. (4), i, p. 461. MLLDFF., Jahrb. d. m. Gesell. ii p. 

 130, 217, 1875. WIMMER, Ueber die Identitat der Helix fasciola 

 Drap. und der H. pyrrhozona Phil., in Sitzungsberichte der k. k. 

 zool.-bot. Ges. Wien, xxviii, p. 44, 1878. HILBER, Sitzungsber. 

 Math.-Naturwissensch. Classe der k. Akad. der Wissenschaften, 

 Ixxxvi, p. 345, t. 3, f. 8. 1883. HEUDE, notes sur les moll. 

 Terr, de la Vallee du Fleuve Bleu, p. 43, t. 16, f. 7, S.ff.faciola 

 DRAP., Hist. Nat. Moll. terr. et fluv. de la France, p. 110, t. 6, f. 

 22-24 ; H. fasciola, on explanation of plate. MABILLE, Rev. et. 

 Mag. Zool. xxiii, p. 49, 1872. 



A well known and very widely distributed Chinese species. 



H. GIUESERI Mousson. PI. 47, figs. 79, 80. 



Shell umbilicated (the umbilicus one-fifth the shell's diameter'), 

 depressed, strongly striated, rather thin, subdiaphanous, pale yellow- 

 ish with a brown dorsal band. Whorls 6. 



Alt. 9, greater diam. 16, lesser 15 mill. 



Wladiwo stock, Siberia, near the Chinese frontier. 



H. (Camcenaty grceseri Mouss., Journ. Conch. 1877, p. 17, t. 1, f. 

 4. 



Allied to H. pyrrhozona, but the shell is thinner and more trans- 

 lucent, the striation less rib-like, and the umbilicus wider. 



H. PEKINENSJS Deshayes. PL 47, figs. 65-70. 



Shell widely umbilicated, depressed, subdiscoidal, thin and fra- 

 gile, whitish horn colored, with a zone of chestnut at the periphery. 

 Surface obliquely regularly costellate, under a lens seen to be most 

 minutely transversely striated; spire very short, slightly convex, 

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

 suture, the last cylindrical. Aperture small, ovate-semilunar, 



I Clique, white ; peristome thickened, expanded, nearly continuous. 

 Alt. 6, diam. 11 mill. (Desh.') 



