214 HELIX-CATHAICA. 



Aperture lunate, oblique ; peristome slightly thickened within, 

 very slightly expanded below and at columella, the upper, outer 

 and columellar margins strongly arcuate, basal margin less curved, 

 outer margin not angled. 



Alt. 7, diarn. 19 mill., sometimes larger. 



Provinces Sytshuan and Shensi, China. 



H. christince H. AD., P. Z. S. 1870, p. 377, t. 27, f. 4, 4a. 

 HEUDE, Moll. Terr. Fl. Bleu, p. Ill, t. 29, f. 6. H. subchristinw 

 ANCEY, Le Naturaliste 1882, p. 44 ; Bull. Soc. Mai. Fr. 1885, p. 

 114. 



The spire is less depressed than in filippina, more depressed than 

 in subsimilis, to both of which it is nearly allied. The H. subchris- 

 tince of Ancey seems to me identical with the typical Christinas. 



Var. SUBSIMILIS Desh. PI. 49, figs. 29, 30, 31, 32, 33. 



Spire convex ; whorls 6-6J, the last less swollen above than in the 

 type, and somewhat more acutely angled at the periphery, the 

 angle disappearing on the latter third of the body-whorl. Colora- 

 tion as in the type, except that the base is milk-white, with some 

 bluish radiating streaks. Umbilicus deep, one-fifth the diameter of 

 the shell, more cylindrical than in the type. 



Alt. 9, diam. 20 mill. 



Alt. 12, diam. 25J mill. 



Provinces Sytshuan and Shensi, China. 



H. subsimilis DESH., Nouv. Arch, du Mus., Bull, ix, p. 10, t. 2, f. 

 28, 29. HEUDE, Moll. Terr. Fl. Bleu, p. 22, t. 20, f. 18. H. (Zon- 

 ites /) subsimilis HILBER, Sitzungs-Ber. p. 338, t. 2, f. 6, 7. ? H. 

 christince var. car inifera H. AD., P. Z. S. 1870, p. 377. Cf. MLLDFF. 

 Jahrb. 1884, p. 351, ANCEY, Nat. Sicil. 1883, and GREDLER 

 Arch. f. Naturg. vol. 50, p. 263. 



The varietal name given by H. Adams is not sufficiently well 

 defined to permit positive identification. 



H. FILIPPINA Heude. PI. 49, figs. 34, 35. 



Shell resembling If. christince, but having the spire completely flat, 

 whorls 5, almost plane above, the suture superficial, subinargined 

 above ; last half of the last whorl descending slightly below the 

 carina, becoming convex above ; very acutely keeled, the keel con- 

 tinuing to the outer lip, which is rendered angular by it. Umbi- 



