316 HELIX. 



bbbb. Globose or depressed, smooth or striate, with spotted 

 bands Iberus (in part). 



aa. Baso-columellar lip concave, not wide or flat. 



b. Large, globular ; lip simple or expanded Helicogena. 

 bb. Depressed, often keeled, ribbed or striate, 0-4 banded 



Iberus (part) ; Levantina. 



II. Penis without flagellum ; shell chalky. 



a. Globose-depressed, heavy, the lip expanded or thickened ; bands 



few or none Eremina. 



aa. Globose or depressed, decussated above, the outer lip not in the 



least expanded, thickened within ; bands many, rarely none 



Euparypha. 



Section Helicogena Ferussac, 1819. 



Helicogena (part) FERUSSAC, Tab. Syst. Faru. Limacons, p. 27. 

 Risso, Hist. Nat. Eur. Merid., p. CO, first species H.pomatia. 

 CHARPENTIER, Cat. Moll. Suisse, 1837, p. 5, for H. pomatia only. 

 HARTMANN, Gastr. Schw., p. 98 (for H. pomatia).- Mqq.-Tand., 

 Hist. Nat. Moll. Fr. ii, p. 179. Pomatia Leach, in TURTON'S Man- 

 ual of the Land and Freshwater Shells of the Brit. Is., 1831, p. 45. 

 BECK, Index Moll., p. 43, and of authors generally. f Lucena, 

 HARTMANN in Syst. Erd- u. Siisswasser Gastr. Eur., p. 40, 1821. 

 Pomacea PERRY, Conchology, pi. 38, 1811 (in part; but diagnosis 

 agrees better with Ampullaria species also included). 



Cantareus Risso, Hist. Nat. Eur. Merid., p. 64, (Helix naticoides 

 sole species). MOQ.-TAND., 1. c., p. 186. Canthareus AGASSIZ, 

 Nomencl. Zool., 1847. Tapada GRAY, in Turton's Manual L. and 

 Frw. Sh. Brit. Is. edit. 1840, p. 127, H. aperta sole species. 



Cryptomphalus Agassiz in CHARPENTIER, Catal. Moll. Terrest. et 

 Fluv. de la Suisse, in Neue Denkschriften der allg. Schweizerischeu 

 Gesellsch. fiir die gesammten Naturwissensch. (=Nouveaux Mem- 

 oires de la Societe Helvetique des Sci. Nat.) i, 1837, p. 5, for arbus- 

 ioruin, aspersa, sylvatica, nemoralis. MOQ.-TAND., 1. c. p. 174, 

 restricted to H. aspersa. Ccenatoria HELD, Isis, 1837, p. 910, for 

 aspersa, lucana, lutescens, pomatia, etc. Erctella MONTS., Naturalista 

 Siciliano xiii, No. 9, June, 1894, for H. mazzidlii. 



^ 



Shell globose or globose-conoid, capacious, with about 4 -5 rapidly 

 widening whorls ; umbilicus narrow or closed ; aperture large, not 



