204 HELIX-CATHAICA. 



H. EDITH A A. Adams. Unfigured. 



Testa depresso-conoidali, late perforata; spira elatiuscula, obtusa, 

 apice obtusa ; anfract. 6, convexiusculis, oblique strigosis et striis 

 volventibus confertis decussatis ; anfractu ultimo ad peripheriam 

 rotundato, ad basim planiusculo ; apertura obliqua, lunata; peristo- 

 mate subexpanso, reflexo, intus vix incrassato. Albida, fasciis 

 duabus rubro-fuscis in anfractu ultimo et fascia unica ad suturas 

 ornata. Lat. 8, alt. 4 lin. (Ad.) 



Island of Risiri, Vladimir Bay., Japan. 



Helix editha (Camena) A. ADAMS in Ann. and Mag. n. H. 4th. 

 ser. i, 1868, p. 462. 



Very similar to H. pyrrhozona Phil., but the spire is more ele- 

 vated, and the form more conoidal. 



Section CATHAICA Mlldff. 



Cathaica MLLDFF., Jahrbiicher des Deutschen malakozoolog- 

 ischen Gesellschaft, 1884, p. 339. Type H. pyrrhozona Phil. 



An extensive group of Helices, confined mainly to China, related 

 to Eulota, Satsuma, Euhadra, Pseudiberus and ^Egista, all being 

 East Asian manifestations of the great group of true Helices, repre- 

 sented in Europe by the Fruticicoloid, Xerophiloid and Pentatseni- 

 ate snails. 



There is a genus Cathaicus Bates, 1870, in Coleoptera, but the 

 two names are sufficiently different. 



The following arrangement is substantially that of von Mollen- 

 dorff. 



(Dextral species.') 



H. PYRRHOZONA Philippi. PI. 47, figs. 60-63. 



Shell solid, umbilicated (the umbilicus about one-eighth the great- 

 est diameter, and rapidly narrowing to a narrow, deep perforation); 

 depressed above and below, the spire low-conoid. Color white, 

 rather opaque, with a broad chestnut-brown band at the periphery, 

 and a faint brownish baud below the suture. Surface shining, 

 sculptured above with close rib-striae, becoming more delicate below. 

 Whorls 5?, the earliest H smooth, shining, forming a subacute 

 apex ; following whorls slightly convex, slowly increasing, separated 

 by an impressed suture. Last whorl much wider, rounded at the 

 periphery, hardly descending in front. Aperture slightly oblique, 



