. Carnegie Institution of Washington publication. . 30 A REVISION OF THE COTYLOSAURIA OF NORTH AMERICA Family NOTHODONTIDAE Marsh. This family was established without diagnosis. Genus NOTHODON Marsh. Am. Journ. Sc, vol. xx (3), 1899, p. 410. Type: A portion of the skull and some limb bones. Yale University Mus. From New Mexico. Original description: "These reptiles may be readily distinguished by the dentition. In each premaxillary there are two slender pointed teeth. In front of the maxillary ./Sfc M\ /"^"—n. there are one or two similar teeth, followed by a € f N f fiw number
. Carnegie Institution of Washington publication. . 30 A REVISION OF THE COTYLOSAURIA OF NORTH AMERICA Family NOTHODONTIDAE Marsh. This family was established without diagnosis. Genus NOTHODON Marsh. Am. Journ. Sc, vol. xx (3), 1899, p. 410. Type: A portion of the skull and some limb bones. Yale University Mus. From New Mexico. Original description: "These reptiles may be readily distinguished by the dentition. In each premaxillary there are two slender pointed teeth. In front of the maxillary ./Sfc M\ /"^"—n. there are one or two similar teeth, followed by a € f N f fiw number with narrow transverse crowns, resem- " '" I j [' j bling in form the premolars of some carnivorous a 6 ,<j mammals. These crowns, when unworn, have a central cusp, and on each side a tubercle, some- what like the premolars of the genus Cam's. In d , the present species the first and last of the teeth are smaller than the middle ones. The limbs were short, the long bones had their extremities covered with cartilage, but the carpals and tarsals were well ossified. The centra were deeply con- d, ., * Fig. 7.—a,b, c, three teeth of Xolhodon Itntus. the tail Was long. Yale Univ. Mus. d, the same, a fragment of "The following measurements are taken from maxillary, x 1. the type specimen of this species: M "Length of the maxillary bone . Space occupied by ten maxillary teeth 015 Height of crown of second maxillary tooth 014 Height of crown of third maxillary tooth 009 Anteroposterior diameter 003 Transverse diameter 008 Anteroposterior diameter of the eighth tooth 005 Transverse diameter 015 "The present species was about 5 or 6 feet in length, and herbivorous in habit. It was apparently slow in movement, and probably more or less ; Nothodon lentus Marsh. The description of this species is embodied in that of the genus. Revised description: This family with its genus and species was founded on extremely fragmentary material from Ne
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