. Carnegie Institution of Washington publication. MORPHOLOGICAL REVISION OF THE SUBORDER. 129 Texas. No. 4035 Am. Mus. Nat. Hist., Cope, coll.: Nine anterior vertebrae in con- nection, beo-inning with the axis, and after a break six posterior dorsals in connection. Spine nearly complete. No. 28 University of Chicago : A fragment of lower jaw. From Coffee Creek, Vernon county, Texas. No. 4064 Am. Mus. Nat. Hist., Cope, coll. : A fragment of the lower jaw shows that the bases of the teeth were decidedly oval in section. This is different from other species where the teeth are rounded or quadrate
. Carnegie Institution of Washington publication. MORPHOLOGICAL REVISION OF THE SUBORDER. 129 Texas. No. 4035 Am. Mus. Nat. Hist., Cope, coll.: Nine anterior vertebrae in con- nection, beo-inning with the axis, and after a break six posterior dorsals in connection. Spine nearly complete. No. 28 University of Chicago : A fragment of lower jaw. From Coffee Creek, Vernon county, Texas. No. 4064 Am. Mus. Nat. Hist., Cope, coll. : A fragment of the lower jaw shows that the bases of the teeth were decidedly oval in section. This is different from other species where the teeth are rounded or quadrate at base; it occurs in a second specimen. No. 28 University of Chicago. The base of the large maxillary canine is quadrate in section, but nearer the middle it is nearly hemispherical in section, the outer side being much more convex than the inner. There are two teeth in the maxillary portion of the diastemal notch. The character used by Cope to distinguish this species, the prominent intercen- trum, is common to all species of the genus, but the forward inclination of the axis and neural arch is a feature unique in the species. The more posterior vertebrae of the type specimen are closely similar to DimetrodoH incisiviis. A posterior dorsal shows the low keel to be divided by a shallow longitudinal groove. The spines of the vertebrae are smooth. The astragalus is rough and rugose, much stronger than any other astragalus in the collections (plate 16, fig. 8). No. 114 University of Chicago: The skull is ver>' similar in outline to that of Dimelrodon incisivtis. The section of the teeth can not be made out, but there are three teeth in the maxillary portion of the diaste- mal notch. This seems to be a distinctive character of the species ; in several specimens of the genus there is a single tooth preceding the enlarged maxillary, but in others there is none or a scar showing where a single tooth has been lost, but never more than one. The diastemal notch is nearly filled with
Size: 1860px × 1343px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcarnegieinstitutionof, bookcentury1900, bookdecade1900
