Page:New land mollusks from Madagascar and Mexico.djvu/10

22 with a concave lamella and two tubercular teeth, the parietal wall bearing a low, thin lamella with a short, V-shaped hook.

12. Polygyra (Erymodon) hertleini, new sp. CNHM No. 106703, type; views from above, below, and side; about × 2.

Type.—Chicago Natural History Museum No. 106703. Collected on Tenecatita Bay, Jalisco, Mexico, about 1½-2 miles up trail, by Leo G. Hertlein, February 15, 1932.

Additional material.—Four more specimens with the same data as the type are at hand. One of these paratypes is Chicago Natural History Museum No. 106704, and three are in the California Academy of Sciences in San Francisco, No. 27212. All these specimens agree perfectly with the type, differing slightly only in the measurements: diameter, 13.2-14.0 mm.; height, 6.6-7.3 mm.

Relationships.—There can be no doubt that this new species has its closest relative in Polygyra (Erymodon) matermontana Pilsbry. My friend and colleague, Dr. Alan Solem, was kind enough to compare my new species with the specimens of Pilsbry's species matermontana in the Philadelphia Academy of Sciences, and he