DESCRIPTIONS OF TWO NEW GENERA AND SIXTEEN NEW SPECIES OF MAMMALS FROM THE PHILIPPINE ISLANDS. By Gerrit S. Miller, Jr., Curator, Division of Mammals, !'. S. National Museum. Of the sixteen new Philippine mammals described in this paper, thirteen are contained in a large collection made by Dr. Edgar A. Me arns during the years 1905 to 1007, and now in the United States National Museum. The three others form part of a collection sub-mitted to me for determination by the authorities of the Philippine Bureau of Science. CROCIDURA HALCONUS, new species. Type-specimen. — Young adult female (skin and skull), Cat. No. 144652, U.S.N.M. Collected on spur of main ridge of Mount Halcon, Mindoro (altitude 6,300 feet), November IS, 1906, by Dr. Edgar A. Mearns. Original number, 6316. Diagnosis. — Like Crocidura grayi Dobson of Luzon, but with unicuspid teeth much more contrasted in size. Color. — Entire animal dark sepia, blackening on posterior half of back, the underparts tinged with broccoli-brown; feet and tail black-ish, the long hairs on tail a slightly contrasted brown. Skull. — The skull does not differ appreciably from that of Crocidura grayi, though the interorbital region seems inclined to be narrower and the braincase less deepened than in the Luzon animal. The size and general appearance of the skull is also very similar to that of the European Crocidura russula; but the Philippine species are at once distinguishable from russula and its near allies by their greater depth of skull, a difference readily appreciable when the braincases are com-pared in posterior view. '/'<<th. — On comparison of specimens of Crocidura grayi and C. halconus wit h perfectly unworn teeth it is immediately seen thai there is much more conl cast in size among the upper unicuspids of the Min-doro animal. This appears to be due to a slight increase in the size of the first and a reduction in the size of the second, the third remaining unchanged. Though especially noticeable in lateral view, these pecul-Proceedings U. S. National Museum, Vol. 38— No. 1757. 391
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