COCHLOSTYLA-HELICOSTYLA. 171 



ir. LUTEOCINCTA Semper. PI. 56, figs. 66, 67. 



Pure white in color ; more globular ; not malleated. (&) 



Casiguran, N. E. Luzon. 



C. LIVIDOCINCTA Semper. PI. 56, figs. 71, 72. 



Imperforate, globose, thin, ornamented with a broad livid band, 

 and another of brown at the suture ; spire scarcely exserted, apex 

 obtuse, bluish, ornamented with a white cuticular band. Whorls 4 

 4 2, nearly flat, the last much inflated, not descending; columella 

 subvertical, excavated, white. Aperture little oblique, lunar ; per- 

 istome simple, scarcely thickened, not reflexed. 



Alt. 27, greater diam. 32, lesser 26 mill. (&) 



Casiguran, Baler, Mariquit, island of Luzon, very rare. 



C. livido-eirictaS., Reis. Phil. Landmoll., p. 182, t. 9, f. 9. 



Of this remarkable species I have found in all, only two adult 

 and two young specimens. (&) 



C. PUDIBUNDA Semper. 



Subperforate, conic-globose, thick, white ; spire exserted, apex 

 obtuse, red or red dish -golden. Whorls 5, a little convex, the last 

 inflated, not descending. Columella lightly arcuate, vertical, white. 

 Aperture little oblique, rounded-lunar ; peristome slightly thickened, 

 not reflexed. Alt. 31, greater diam. 35, lesser 28 mill. 



Minanga, Ambubuk and Digollorin, Luzon. 



C. pudibunda SEMPER, /. c., p. 183. 



Agrees entirely with typical Cochlostyla in anatomy. This species 

 has not been figured. 



Section VII. HELICOSTYLA Ferussac, 1819. 



As used here, this section comprises a number of minor groups, 

 too closely allied to be given separate rank as primary sections. 



The shells have generally a more elevated contour than those in- 

 cluded in Calocochlea, and usually they lack hydrophanous cuticle 

 and spiral striae. 



It must freely be admitted that the differences between this group 

 and Calocochlea are not definite -enough to permit one to frame 

 diagnoses of any practical value. In the arrangement of the spe- 

 cies no two authors agree in detail, this diversity of opinion being 

 the natural result of the indiscriminate inosculation of characters 

 shown by the shells themselves. 



