. Carnegie Institution of Washington publication. 14 PERMO-CARBONIFEROUS VERTEBRATES FROM NEW MEXICO. fuse with the quadrate and thus completely close the ear notch. A thin plate of bone extends forward from the lower anterior inner edge of the tabulare and leaves but a small slit-like opening at the bottom of the large depression back of the ear notch. No such process is present in Chenoprosopus milleri, however, and the opening, if an opening, must have been considerably larger in the latter genus. Little can be said of the palate; the anterior part is still inclosed in an extremely hard mat
. Carnegie Institution of Washington publication. 14 PERMO-CARBONIFEROUS VERTEBRATES FROM NEW MEXICO. fuse with the quadrate and thus completely close the ear notch. A thin plate of bone extends forward from the lower anterior inner edge of the tabulare and leaves but a small slit-like opening at the bottom of the large depression back of the ear notch. No such process is present in Chenoprosopus milleri, however, and the opening, if an opening, must have been considerably larger in the latter genus. Little can be said of the palate; the anterior part is still inclosed in an extremely hard matrix, and although the left posterior part is exposed, the bones are some- what crushed and their relations can not be told with any degree of certainty. The. Fig. 5.—Chenoprosopus milleri, X l/j. Palate view. palate is essentially flat. The conjoined palatines and pterygoids are broad and leave a long, comparatively narrow inter-pterygoid opening. This is especially true in the posterior fourth of the palate, where the posterior processes of the pterygoids converge in a gentle curve inward to join the quadrate. In fact, unless the skull is compressed much more than the specimen would suggest, the opening at this point is a mere slit. The posterior pterygoid process extends upward in a thin plate, inclosing a large infra-temporal vacuity. This is approximately rectangular, about 65 mm. long and 35 mm. wide. The inner ante- rior border is broken, but suggests a postero- lateral process such as is seen in Cacops. While the parasphenoid is not preserved, one can say with some degree of certainty that its lateral extent was slight, because of the nar- row inter-pter\'goid space. Although the entire palate dentition can not be shown, some of the details are worth considering. Extending forward for a distance of about 40 mm. from the anterior border of the infra-temporal vacuity is a low rounded ridge, the posterior end of which is continuous with the inner border of the posterior p
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