Bartsch — Critical Remarks on Philippine Land Shells. 181 



Cochlostyla palavanensis bancalanensis Bartsch. 

 In 1918 we described the above subspecies in these Proceedings, volume 

 31, pp. 200-201. There is no need to repeat here except to say that this 

 race from Bancalan Island is paler and less contrastedly streaked than the 

 other forms mentioned. 



Cochlostyla palavanensis culionensis, new subspecies. 



This is the mollusk which von M Ollendorff considered Cochlostyla satyrus 

 librosa. Cochlostyla librosa Pfr., however, is a different race of palavanensis 

 occurring in Palawan, as I shall point out when I come to discuss the Pala- 

 wan members. The present race appears without a name. It is much less 

 strongly banded than the forms heretofore discussed and has a tendency 

 toward fenestration near the suture. 



Four specimens yield the following measurements: 



iType. 



Cochlostyla weberi, new species. 



Shell depressed helicoid, thin, semitranslucent, white, excepting the 

 region about the columellar area which is pale yellow. The exposed por- 

 tion of the whorls is well rounded, separated by a well impressed suture, 

 marked by decidedly retractive lines of growth. Periphery of the last 

 whorl rounded; the convexity of the spire and the base, however, lends 

 to it the aspect of having an obtuse angulation. Base marked like the spire, 

 the convexity equalling that of the upper portion of the whorl. Aperture 

 oblique, broadly oval; outer lip thin, slightly thickened at the edge, and 

 only moderately reflected; columella very oblique, decidedly excavated; 

 parietal wall glazed with a scarcely perceptible callus. The very thin 

 epidermis has a somewhat crinkly appearance which gives one the impres- 

 sion of obsolete microscopic spiral striations which, however, are not ap- 

 parent when one examines the shell under the microscope. 



Three adult and an equal number of juvenile individuals are in our col- 

 lection. The adult shells yield the following measurements: 



Cat. No. 



336032 



256040 



i 336048 



Collection. 



U. S. N. M. 



Locality. 



Candaraman Id. 



Collector. 



Weber 

 U. S. B. F. 

 Higgins 



iType. 



