. Bulletin - United States National Museum. Science. 134 BULLETIN 169, UNITED STATES NATIONAL MUSEUM patratus, but it is closer to the latter than to E. cuspidata and shows the Elpidophorus line to have been distinct at this time. Dimensions of the type are as follows: Length P3, ; width P3, ; length P4, ; width P4, ; length Mi, ; width Mi, ; length M2, ; width M2, Figure 27.—Elpidophorus minor, new specie?, Princeton Univ. no. 14201, left lower jaw: a, Crown view; &, internal view. Six times natural size. 7INSECTIV0RA, incertae sedis PICRODONTIDAE, new family Ty
. Bulletin - United States National Museum. Science. 134 BULLETIN 169, UNITED STATES NATIONAL MUSEUM patratus, but it is closer to the latter than to E. cuspidata and shows the Elpidophorus line to have been distinct at this time. Dimensions of the type are as follows: Length P3, ; width P3, ; length P4, ; width P4, ; length Mi, ; width Mi, ; length M2, ; width M2, Figure 27.—Elpidophorus minor, new specie?, Princeton Univ. no. 14201, left lower jaw: a, Crown view; &, internal view. Six times natural size. 7INSECTIV0RA, incertae sedis PICRODONTIDAE, new family Type.—Pier odus'Douglass, 1908. Distribution.—Middle and Upper Paleocene, North America. Diagnosis.—-Minute insectivoreUke or batlike forms of doubtful ordinal affinities, with one pair of greatly enlarged incisors (at least in lower jaw), muzzle long and slender, canines reduced, premolars small with no tendency to molarization, molars large, brachyodont, with shallow, expanded basms and indistinct cusp structure, adaptively resembling molars of the recent Phyllostomatidae. Discussion.—At present only two genera, Picrodus and Zanycteris, are referred to this family, and these are not directly comparable with each other. The evidence for their close relationship is, however, impelling, as discussed below. The separation of family characters- from those merely generic is not entirely practicable in this stage of knowledge, but there can be Httle doubt that these two genera do belong to a family otherw^ise unknown, and the characters given in the above diagnosis distinguish them from any other family. The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for
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