HELIX-OBBA. 237 



Aperture very oblique, lunate-oval, livid inside ; peristome brown, 

 subthickened, shortly reflexed, margins joined by a callus, the basal 

 margin with a white, obsolete tooth within, dilated outwardly ; um- 

 bilicus narrow, deep, half concealed. 



Alt. 21, greater diam. 27, lesser 23 mill. (P/V.) 



Habitat unknown. 



H. campanula PFR. P. Z. S. 1845, p. 65 ; Mon. Hel. Viv. i, p. 

 321 ; Conchyl. Cab., p. 231, t. Ill, f. 13, 14. REEVE, Conch. Icon, 

 f. 66. 



Compared by Pfeiffer to Cochlostyla brachyodon. 

 Var. /?. Pale brown, apex chestnut colored, peristome white. 

 (PL 53, figs. 11, 12.) 



H. BINTUANENSIS Hidalgo. PL 61, fig. 28. 



Shell obliquely rimate, globose, solid, somewhat shining, sculp- 

 tured with scarcely visible growth lines (in places most minutely 

 granulose under a lens) ; tawny, 3-banded with rufous ; spire half- 

 globular, apex obtuse ; suture simple, marked by a hair-line of white. 

 Whorls 5, convex ; the three last wide, subequal, the last not descend- 

 ing in front, periphery scarcely angled ; somewhat turgid beneath. 

 Aperture oblique, truncate-oval, whitish inside, with pellucid bands ; 

 peristome flesh-colored, thickened-reflexed, margins joined by a thin 

 callus, the right margin noduliferous at the insertion ; columellar 

 margin inwardly thickened-subtruncate, outwardly much dilated, 

 nearly closing the rimation. Alt. 30. greater diam. 28, lesser 26 



mill. (Hid.} 



Penon de Bintuan, Island of Busuanga, Philippines. 



Helix Bintuanensis HIDALGO, Journ. de Conch, xxix, 1889, p. 

 296, t. 13, f. 1. 



A form allied to H. campanulata Pfr. The three bands are situ- 

 ated, one at the suture, one above and one below the quite obvious 

 angulation encircling the periphery of the last whorl. 



H. CAMELUS Pfeiffer. Unfigured. 



Shell compressly umbilicated, conoid bell-shaped, solid, striate, 

 under a lens most minutely decussated, white, trifasciate with chest- 

 nut. Spire ventricose, conoidly attenuated above ; whorls 6, moder- 

 ately convex, the last scarcely descending in front ; base sub- 

 gibbously compressed. Aperture diagonal, truncate-oval ; columella 



