﻿A NEW PHILIPPINE LANDSHELL 

 By PAUL BARTSCH 



The United States National .Museum in a recent consignment of 

 natural history specimens, collected by Major Edgar A. Mearns, 

 l". S. A., in the Philippine Islands, received among other things a 

 beautiful Helicostyla which appears to he undescribed. It comes 

 from Alt. Apo. Mindanao, and was collected at an altitude of about 

 5,000 feet, July 10, 1904. It gives me pleasure to name this shell 

 in honor of Dr. Mearns. 



HELICOSTYLA MEARNSI new species 

 (Plate LVI) 



Shell ovate-conic, imperforate, thin, translucent. Nuclear whorls 

 one and one-half, well rounded, without sculpture. Post-nuclear 

 whorls three and one-half, shining, moderately rounded, marked by 

 many very fine lines of growth and still finer closely spaced spiral 

 lines. The summits of the last and the penultimate whorls are 

 closely appressed to the preceding one. Summit of the last whorl 

 gradually and evenly deflected to about tw r o millimeters below the 

 slightly angulated periphery behind the peristome. Aperture large, 

 oval, oblique, provided with a moderately thickened and reflected 

 peristome ; columella moderately broad, irregularly curved, with an 

 irregular, well impressed, median groove extending from the inser- 

 tion to the base ; parietal wall covered by a very thin callous. Col- 

 oration : nucleus white, post-nuclear whorls malachite green posterior 

 to the periphery of the last whorl, the intermediate regions between 

 the nucleus and the last wdiorl more or less evenly graded between 

 these two colors ; base chromium green with three somewhat inter- 

 rupted chrome yellow spiral bands which are bordered on each side 

 by a faintly incised spiral line, the anterior one, on the middle of 

 the base, is the broadest, two millimeters wide, the posterior one 

 marking the periphery with its posterior border is one millimeter 

 wide, the third is a mere line and lies half way between the other 

 two ; lip and columnella pale rose purple : umbilical region marked 

 by a pale brown area ; while the interior of the shell is pale pearly 

 blue. 



The shell measures: alt. 33 mm., lat. 25.5 mm.; aperture alt. 

 19.6 mm., lat. 15 mm. It is entered as number 180896 in the regis- 

 tration book of the Div. of Mollusks U. S. N. M. 



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