. Breviora. No. 93 PANTODONTA BARYLAMBDTDAE Leptolambda^ <i'on. nov Type species. L. schiiudii sp. nov. Distrihution. Late Paleocene, Tiffanian stage; Silver Coulee beds, Polecat Bench formation, Park and Bighorn counties, Wyoming; Plateau Valley beds, DeBe(iue formation, ^lesa County, Colorado. Diae/nosis. 1.^ CvP-i-M.^, no diastemata. Incisors above small, with lateral crest on each side; lower incisors larger than up- lier with lateral crests more prominent, forming a spatulate tooth comparatively longer anteroposteriorly and shorter trans-. Figure 1. LeptoJamhiln schmidti gen.
. Breviora. No. 93 PANTODONTA BARYLAMBDTDAE Leptolambda^ <i'on. nov Type species. L. schiiudii sp. nov. Distrihution. Late Paleocene, Tiffanian stage; Silver Coulee beds, Polecat Bench formation, Park and Bighorn counties, Wyoming; Plateau Valley beds, DeBe(iue formation, ^lesa County, Colorado. Diae/nosis. 1.^ CvP-i-M.^, no diastemata. Incisors above small, with lateral crest on each side; lower incisors larger than up- lier with lateral crests more prominent, forming a spatulate tooth comparatively longer anteroposteriorly and shorter trans-. Figure 1. LeptoJamhiln schmidti gen. et sp. nov. Upper dentition of right side, PU Xo. 14996 (unshaded teeth from PU Xo. 14680). x versely than in Baruhniibda. Canines smaller than in Bavii- lamhda, in supposed females incisiform. Premolars of typical barylambdid pattern; P| one rooted; P-1-usually broader trans- versely than in Bayylambda. Talonid bases of P 2:3-compara- tively larger than in Barylambda or HapJoJanihda, with serial homologue of crista obliqua directed anteriorly, not running obliquely anterointernally to long axis of tooth as in BaryJamhda. Upper molars differing from those of Haplolamhda and resem- bling those of Bar]ilamhda in M-=-larger than M—; distinguished .. ,„ jlender ; with reference to the less robust post- ore slenrter construction of the long bones than in rtnru. I From the Greek ir/j/os. thin, sieiuier ; wun reiereiice to cne less rouust post- cranial skeleton and more slenrter construction of the long bones than in Bary- lambda, plus -lambda, referring to the Zanibda-shaped molar crests, and to agree with related 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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