CALLISTOPLEPA. 125 



Species of other genera described as Columna. 



Columna bulimea Sp\x = Thaumastus Man. Conch., x, p. 

 55 (Bulimulida) . 



Columna ramentosa J. G. Cooper = Plicolumna in Buli- 

 mulidce, Man. Conch., xi, p. 153. 



Columna calif ornica auct. = Rkodea. 



Columna aciculoides Crist, & Jan., Catalogus, Mantissa, 

 p. 2 = Cecilioides. 



Columna miliaris C. & J., 1. c. = Cecilioides. 



Columna clavula Villa = Opeas. 



Columna dentiens Villa = Azeca. 



Columna eximia Shuttl., Pfr. = Clavator. 



Columna teres Meek & Hayden, Report of the U. S. Geol. 

 Survey of the Territories, ix, 1876, p. 555, pi. 44, f. 11. 



Columna vermicula M. & H., t. c., p. 556, pi. 44, f. 12, 

 with var. contraria Meek, p. 557. This form and the pre- 

 ceding, from the Laramie of the Upper Missouri, Fort Union 

 Group, are much smaller than the recent Columnas, with 

 more numerous whorls; they have the apex small and acute, 

 and therefore cannot belong to Columna as that genus is 

 now restricted. There is absolutely no reason to believe them 

 at all related to this African genus. 



Genus CALLISTOPLEPA Ancey, 1888. 



Callistoplepa ANCEY, Bull. Soc. Malac. France, v, 1888, 

 p. 69, foot-note no. 2, type A. shuttleworthiana Pfr. Gano- 

 midos D'AILLY, Moll. terr. et d'eau douce de Kameroun, p. 

 68 (lS96).Callistopepla ANCEY, Nautilus, xii, p. 92, type 

 A. shuttleworthi (Dec., 1898). 



Shell ovate-conic, very thin, subdiaphanous, slightly glossy, 

 corneous, with a varnish-like luster, ornamented with red- 

 dish stripes, zigzag or angularly bent forward at the suture 

 and periphery, and usually minutely speckled with white. 

 Spire conic, the apex mamillate, obtuse. Whorls about 6, a 

 little convex, the nucleus smooth, the rest very closely rib- 

 plicate and finely striate spirally; the embryonic whorl sep- 

 arated by a channelled, plicate suture, the rest with an im- 



