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. (Pfr.) 



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 rim ate, 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 



