132 COCHLOSTYLA-CALOCOCHLEA. 



wider, heavier and toothed columella, and the wider, thicker lip. 

 These characters compel me to regard denticulata as a distinct 

 species, even though but one specimen of it is known to me. 



C. ALBAIENSIS Sowerby. PI. 52, figs. 20, 21. 



Imperforate, depressed-globose, shining, white, uuicolored or 

 brown-banded ; spire depressed, suture linear ; whorls 4, nearly flat, 

 the last inflated beneath ; columella thin, nearly straight, sloping, 

 profoundly excavated. Aperture lunate-oval, upper margin sub- 

 depressed ; peristome widely expanded, white, the margin subthick- 

 ened, forming a distinct angle with the base. (Pfr.) 



Alt. 26, diam. 39 mill. 



Palanan to Camiguin de Luzon, E. coast of N. Luzon, andAmber- 

 buk, Province of La Isabella, Luzon. 



H. albaiensis SOWB., P. Z. S., 1840, p. 100. PFR., Monogr. i, p. 

 260; Conchyl. Cab. p. p, 215, t. 108, f. 1, 2. REEVE, Conch. Icon, 

 t. 13. f. 48, Cochlostyla albaiensis SEMPP:R, Reis., p. 176, t. 8, f. 7 ; 

 t. 18, f. 14 (anatomy). 



C. TUKANENSIS Pfefffer. PI. 29, figs. 7, 8, 9, 12. 



Imperforate, subglobose, thin ; surface smooth, the spiral and in- 

 cremental striae almost obsolete. White or rosy under a thin yel- 

 lowish or reddish cuticle, sometimes having a dark band at periph- 

 ery and another at suture; hydrophanous cuticle generally absent, 

 but sometimes forming a few bands. 



Spire moderately elevated, apex very obtuse ; whorls 4, convex, 

 the last not perceptibly descending in front. Aperture large, pink 

 or white within ; peristome thin, pink or white, broadly expanding ; 

 columella oblique, flattened, thin, nearly straight. 



Alt. 29, diam. 31 mill. 



Tukan Bessi Id. (P/r.) ; Pidar Is. (Horn). 



H. tukanensis PFR., Mai. Bl. xviii, p. 122, 1871 ; Novit. Conch, 

 iv, p. 72, t. 121. f. 5-9 ; Monogr. vii, p. 324. 



A more elevated and thinner shell than C. cromyodes. Part of 

 the specimens before me are yellow instead of reddish, and some are 

 very small, alt. 17, diam. 23 mill. 



C. OBTUSA Pfeiffer. PI. 35, figs. 23, 24. 



Imperforate, subglobose, thin, subdecussated with growth-lines 

 and impressed obsolete concentric lines, shining, chestnut. Spire 

 subelevated, obtuse. Whorls 4, convex, the last inflated. Colu- 



