FOUK NEW LAND SHELLS FROM THE PHILIPPINE 



ISLANDS. 



By Paul Bartsch, 



Assistant curator, Division of MoUusks, U. S. National Museum. 



The Philippine Bureau of Science, through the honorable tlie Sec- 

 retary of the Interior, Dean C. Worcester, has recently transmitted a 

 large consignment of mollusks to the U.S. National Museum for report. 

 Among these are a number of new forms, four of which are here 

 described. 



COCHLOSTYLA WORCESTERI, new species. 

 Plate 29, figs. 14, 16. 



Shell elongate-ovate. Nuclear whorls one and one-fourth, almost 

 smooth. Post-nuclear whorls moderately rounded, with closely 

 appressed summits. Sutures moderately impressed. Periphery of 

 the last whorl with a faint angulation. Aperture quite oblique, 

 oval, outer lip moderately expanded and reflected to form a some- 

 what thickened peristome. Columella slender and twisted. Parietal 

 wall glazed with a weak callus. Entire surface marked by retractive 

 lines of growth and exceedingly fine spiral striations, the last con- 

 fined to the very thin epidermis. 



Color. — Early whorls provided with a peripheral brown band 

 which is strongest on the first and gradually weakens, being lost 

 altogether on the fourth turn. The band renders the first one and 

 one-half whorls of the spire almost brown, after which it appears as 

 a mere suggestion above the sutures. A second brown band, vary- 

 ing in strength in different individuals, is situated at the summits 

 of the whorls. Ground color of early whorls bluish- white ; of the 

 later ones straw-colored. Surface covered with irregular axial 

 stripes of a thin opaque yellowish-white epidermis; stripes usually 

 wider than the interspaces and extending from the summits to the 

 umbilical area. These stripes obscure the brown band at the sum- 

 mit, where they cross it and make it appear as an interrupted line 

 of dots. Reflected tip and umbilical area dark chocolate brown; 

 columellar edge pale rose color. Interior bluish-white. 



The type (Cat. No. 205213, U.S.N.M.) has six whorls, and meas- 

 ures — length, 37 mm.; diameter, 23 mm.; aperture, length, 19.5 

 mm.; diameter, 14.9 mm. 



Proceedings U. S. National Museum. Vol. 37— No. 1705. 



295 



