PHILIPPINE LAND MOLLTJSKS 



339 



OBBA MARMORATA BOLINAOANA, new subspecies 



Plate 86, Figure 5 



In this race the periphery of the last whorl is decidedly angulated, 

 and the base is much less inflated than in the typical form. It re- 

 sembles most nearly Obba marmorata benguetana, from which it 

 differs by being larger and smoother, in having a larger umbilicus, a 

 much stronger peristome, and a much larger aperture; it also has a 

 much paler color pattern. 



Type. — U. S. N. M. No. 116345 has 4.8 whorls, and measures: 

 Height, 17.5 mm; greater diameter, 31.9 mm; lesser diameter, 24.3 

 mm. It was collected by Cuming at Bolinao, on the northwestern 

 point of Pangasinan Province, Luzon. 



OBBA MARMORATA BENGUETANA, new subspecies 



Plate 86, Figure 4 



This is the smallest known race with the sharp angulation of the 

 periphery and the poorly rounded base. It is much thinner and 

 darker colored than Obba marniorata bolinaoana. Its umbilicus and 

 the aperture are smaller, the peristome is much less strongly devel- 

 oped, and the under surface of the last whorl is ever so much more 

 strongly wrinkled. 



Type. — U.S.N.M. No. 256484 has 5 whorls, and measures : Height, 

 13.7 mm; greater diameter, 27.3 mm; lesser diameter, 21.8 mm. It 

 was collected by Dr. E. A. Mearns at an altitude of 5,000 feet at 

 Baguio, Benguet Province, Luzon. 



Additional material. — Four topotypes, U.S.N.M. No. 256563, yield 

 the following additional measurements: 



OBBA MARMORATA MARMORATA (Von Mollendorff) 



Plate S6, Figure 6 



1S9S. Obbhw, planulata marmorata Von Mollendorff, Abh. Naturf. Ges. Gor- 



litz, vol. 22, p. 85. 

 1905. Obbina planulata marmorata Von Mollendorff, Kobelt and Winter, 



Semper's Reisen im Archipel der Philippinen, vol. 10, pt. 1, p. 20, pi. 5, fig. 3. 



