304 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



and measures — altitude, 29.1 mm. ; greater diameter, 38.3 mm. ; 

 lesser diameter, 30.5 mm. Mr. Webb's specimen has five whorls and 

 measures — altitude, 30.6 mm.; greater diameter, 35.5 mm.; lesser 

 diameter, 29.2 mm. The present subspecies is distinguisred from all 

 the other forms of Cochlostyla Imonica by its extremely dark 

 coloration. 



COCHLOSTYLA DOMINGOI, new species. 



Plate 20, figs. 1-3. 



Shell subglobose, snbdiaphanous, milk white, excepting the base 

 at the insertion of the columella, which is tinged with pale olive- 

 green, the edge of the columellar callus being marked by a narrow 

 line of pale purple. All the whorls well rounded, marked by fine, re- 

 tractively curved, incremental lines, and fine, irregularly spaced 

 spiral li rations, the latter becoming obsolete on the last turn. In 

 addition to the above sculpture, the surface is slightly malleated be- 

 yond the nepionic whorls, mostly so on the antepenultimate turn. 

 Suture moderately constricted. Periphery inflated, well rounded. 

 Base strongly rounded, marked like the spire, the malleations, how- 

 ever, being faint and scattered. Aperture large, very oblique, de- 

 cidedly effuse at the junction of the basal and outer lip; outer lip 

 slightly expanded and reflected; columella slender, slightly curved, 

 very oblique ; parietal wall not covered by a callus. 



The type (Cat. No. 218399, U.S.N.M.), and a paratype in Mr. 

 Webb's collection, come from Makabenga. The type has 4.6 whorls 

 and measures — altitude, 18.9 mm.; greater diameter, 23.8 mm.; lesser 

 diameter, 19 m.m. Mr. Webb's specimen has 4.5 whorls and meas- 

 ures — altitude, 19 mm. ; greater diameter, 23.5 mm. ; lesser diameter, 

 19.5 mm. This little species seems quite distinct from any of the 

 forms known from the Philippine Islands. 



COCHLOSTYLA SCHADENBERGI ILONGA'i \, new subspecies. 



Plate 19, figs. 1-3. 

 Shell broadly conic, with a strong peripheral keel. Nuclear whorls 

 white, the succeeding turns pale horn colored, gradually deepening in 

 tint as the shell increases in size. Placed upon this ground color we 

 find a series of irregular shaped, retractively slanting axial white 

 areas on the posterior half of the whorls, which are about as wide as 

 the darker areas that separate them. These light areas send out 

 slender spurs at the summit, which meet and make a narrow, wavy 

 white line at the upper edge of the turns. The anterior termination 

 of the light axial zones send out a slender spur on the rear side only, 

 which almost connect with the neighboring light zones, giving this 

 part of the shell the aspect of being marked by a slender white spiral 

 thread. The anterior half of the dorsal surface is marked by four 

 spiral threads, of which the second is double the width of the rest, 



