70 CURVELLA, PHILIPPINES. 



Philippines: Catanduanes; also at the village Caramuan, 

 Luzon. 



Hapalus scalaris Q. et MLLDFF., Nachrbl., 1895, p. 117. 



43. C. PERPORATA (Moellendorff). PL 9, figs. 61, 62, 63. 



Shell perforate, turrite-ovate, rather solid, waxen, opaque; 

 spire regularly turrited, the apex rather acute. "Whorls 6 to 

 7, a little convex, rather rapidly increasing, parted by an 

 impressed suture; microscopically costulate-striate, the striae 

 strongly sigrnoid, and decussated by minute spiral lines, al- 

 most granulose. Last whorl spirally compressed below the 

 suture, base regularly rounded ; more than half the length of 

 the shell. Aperture slightly oblique, at the base a little re- 

 ceding, irregularly piriform, broadly channelled above, im- 

 pressed at the sinulus; peristome simple, acute, the upper 

 margin deeply receding at the suture, then almost angularly 

 roundly arching forwards; columellar margin dilated, half 

 covering the perforation, the margins joined by a distinct cal- 

 lus. Colurnella long, straight. Length 20, diam. 1Q1/4, aper- 

 ture 101/4x61/4 mm. (Mdllff.). 



Luzon: Montalban, province of Manila. 



Hapalus perforatus MLLDFF., Bericht. Senck. Ges., 1890, 

 p. 246, pi. 8, f. 7. 



Distinguished from H. grateloupi by the perforation, but 

 this is much narrower than in H. umbilicatus, from which it 

 further differs in the fine granulation, visible only under a 

 lens, which gives the shell a dull appearance, H. utiibilicatus 

 being glossy. 



44. C. PHILIPPINICA Pilsbry, n. sp. PI. 6, figs. 66, 67. 



Shell narrowly umbilicate, thin, oblong-conic, corneous- 

 subopaque. Spire with nearly straight sides and very obtuse 

 apex. AVhoiis 51,4, rather convex, parted by a deeply incised 

 suture, which is bordered below by a white line. The surface 

 appears somewhat dull, and is sculptured with fine, irregular, 

 close growth-striae, which are everywhere weak, but are a little 

 stronger and conspicuously arcuate below the suture on the 

 last whorl. Aperture vertical, irregularly piriform or drop- 



