302 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.55. 



first turn to a dark brown, Avhicli is almost purplish-black on the last 

 turn, while the periostracum is banded with dark zones of the same 

 tint as the shell and light buff hydrophanous lines and bands, the 

 width and spacing of which are shown by our photograph of the 

 type. Aperture large ; outer lip moderately reflected, marked by the 

 spiral bands to the very edge on the outside, while within it is edged 

 by a broad, almost black border, which changes to a purplish tinge 

 where it joins the bluish, satiny luster that colors the rest of the in- 

 terior ; columella somewhat flexuose, very dark excepting at the inser- 

 tion, which is white, the juncture of the white and dark areas being^ 

 marked by a purple line ; parietal wall covered by a moderately thick 

 callus. 



The type (Cat. No 218400, U.S.N.M.) comes from Makabenga. It 

 has 5.9 whorls and measures — altitude, 74.8 mm.; greater diameter, 

 57.9 mm. ; lesser diameter, 49 mm. Compared with the other known 

 subspecies of Cochlostyla lignaria^ the present form stands out mark- 

 edly by the almost black coloration of the last whorl. 



COCHLOSTYLA MACROSTOMA VIZCAYANA, new subspecies. 



Plate 18, fig. 6. 



Shell ovate, whorls well rounded, marked by decidedly, retrac- 

 tively slanting lines of growth and numerous fine incised spiral lines. 

 Entire surface of the shell covered by a very thin deciduous periostra- 

 cum, which carries the light hydrophanous spiral color markings 

 shown in our figure of the t3'pe. The darker bands and lines are 

 simply ground color showing through the transparent areas of the 

 periostracum. Periphery inflated, well rounded. Suture moder- 

 ately constricted. Aperture large, slightly channeled anteriorly; 

 outer lip moderately reflected, with a broad dark brown zone at the 

 inner edge, which shades to purplish where it joins the satiny bluish 

 color of the interior ; columella short, twisted, colored like the inner 

 edge of the lip, at its inner border shading to the bluish of the in- 

 terior on the callus that is reflected over the base ; parietal wall cov- 

 ered by a very thin, pale bluish callus. 



The type (Cat. No. 218403, U.S.N.M.) comes from Makabenga. 

 It has 6.4 whorls and measures — altitude, 60.9 mm. ; greater diameter, 

 40.7 ; lesser diameter, 33.9. The present subspecies, like all the other 

 dark-colored C ochlostylas in this region, is at once differentiated 

 from all its nearest allies by its much darker coloration. 



COCHLOSTYLA CARINATA LUNAI, new Bubspecies. 



Plate 18, fig. 5. 



Shell elongate conic, decidedly carinated at the periphery of the 

 last turn. Whorls moderately rounded, marked by slender, retractive 

 lines of growth and rather coarse incised spiral lines. In addition 



