224 HELIX-OBBA. 



H. livesayi PFE., P. Z. S. 1860, p. 134 ; Mai. Bl. 1860, p. 239 ; 

 Monographiav, p. 413; Novit. Conch, iii, p. 397, t. 92, f. 12, 13. 

 Obbina livesayi SEMPER, Phil. Archip. Landmoll., p. 127. MOL- 

 LENDORFF, Mai. Bl. n. f. x, p. 155 ; Bericht Senckenb. naturforsch. 

 Ges. 1890, p. 221. 



Mollendorffhas noticed a form luteofasciata and mutations palles- 

 cens and albina, with monstr. subscalaris, from Olango and Pandano, 

 between Zebu and Bohol. 



Allied to H. scrobiculata ; distinguished by the darker coloration 

 and much smoother surface. 



H. SCROBICULATA Pfeiffer. PI. 56, figs. 67, 68, 69, 70, 71. 



Shell umbilicated, depressed, lens-shaped, acutely carinated, of a 

 delicate brownish tint, varied by obliquely radiating white streaks 

 and brown spiral bands, of which one on the middle of the upper 

 surface and another on the base are conspicuous and constant. 

 Surface having strong oblique growth-striae and on the base close 

 fine spiral impressed lines. Basal lip with a strong tooth, marked 

 behind the peristome by a corresponding pit. 



The shell is solid, rather thin, strongly obliquely striated. Spire 

 low-conoidal, apex obtuse. Whorls 4f, the inner two polished, 

 whitish ; last whorl abruptly deflexed in front, constricted behind 

 the basal lip, and having a pit to mark the place of the lip-tooth. 

 Besides the single prominent bands above and below, there are often 

 narrow, faint ones above and below the carina, and a little distance 

 below the suture. The aperture is horizontal, ovate, white within 

 and showing the band ; peristome white, continuous, broadly ex- 

 panded, basal lip reflexed, strongly toothed in the middle. 



Alt. 11, greater diam. 27, lesser 22 mill. 



Alt. 9, greater diam. 22, lesser 18 mill. 



Island of Zebu, Philippines. 



H. scrobiculata PFR. P. Z. S. 1842, p. 88 ; Monogr. Hel. Viv. i, p. 

 403 ; Conchylien Cab., p. 67, t. 78, f. 13-15. PHILIPPI, Abbild. u. 

 Beschreib. ii, p. 185, Helix t. 9, f. 6. EEEVE, Conch. Icon. f. 130. 

 HIDALGO, Journ. de Conchyl. 1887, p. 104. 



Pfeiffer gives Bohol as the locality, on the authority of Cuming. 



The species differs from H. listeri in the sculpture, coloration and 

 white interior of the mouth \ from H. rota it differs in having the 

 keel smooth, not fluted, and the sculpture much less strongly de- 

 veloped ; moreover, the parietal callus is adnate to the body-whorl 



