18 PEOCEEDINGS OF THE NATIOISTAL MUSEUM vol. 78 



of distantly spaced brown spots from an interrupted band at the 

 summit of the last turn. The nuclear whorls merge imperceptibly 

 into postnuclear turns. The first half turn smooth, after which the 

 sculpture characteristic of the succeeding whorls begins. Postnuclear 

 whorls well rounded, marked by four strong spiral threads, which 

 occupy the anterior two-thirds of the turns. The heaviest of these 

 is at the periphery where it forms a decided keel; the other three, 

 which are of equal strength, are also about equally spaced. In 

 addition to this sculpture the whorls are marked by fine, quite 

 regular, rather closely spaced spiral threads. The axial sculpture 

 consists of fine, closely approximated, retractively slanting threads, 

 which lend to the shell a silky luster. Base rather depressed, well 

 rounded, marked by a cord equaling those posterior to the periphery 

 and a little farther removed from the periphery than the first post 

 peripheral cord is separated from this. The rest of the base is 

 marked by closely spaced spiral threads, which are a little stronger 

 than those on the spire. The base is narrowly openly umbilicated. 

 Aperture large, subcircular; peristome white, very broadly flaringly 

 expanded, marked by concentric lines of growth, the columellar 

 portion being also reflected to more than half cover the umbilicus. 

 Parietal wall glazed with a thin callus. 



The type, Cat. No. 312965, U.S.N.M., was collected by E. C. 

 McGregor, for whom I take pleasure to name it, on Mount Banahao, 

 Luzon. It has 5 whorls, and measures — height, 10.0 mm.; greater 

 diameter, 10,5 mm. ; lesser diameter, 8.0 mm. 



The paratype in the possession of the Philippine Bureau of 

 Science lacks the spiral color band of the base, but has the series of 

 brown spots described for the type continued as axial bands across 

 the last three whorls where they extend to the periphery in a zigzag 

 manner. This specimen is a little larger than the type. It has lost 

 the early whorls. It measures — greater diameter, 11.4 mm.; lesser 

 diameter, 9.0 mm. 



This species approximates Leptopoma cuticulare Mollendorff. A 

 specimen of this collected by Quadras at Mount Limuton, Morong 

 District, can be distinguished at once from the present race by the 

 presence of a second strong spiral cord on the base. 



SULFURINA CITRINELLA BANAHAOANA, new subspecies 



Plate 9, Figures 1-3 



Shell similar to Sulfurina citrinella paghilaoensis Bartsch but a 

 little more convex and in every way larger; also of much darker 

 coloration, the shade here being pale orange. 



