. Bulletin. Natural history; Natuurlijke historie. 78 PEABODY MUSEUM OF NATURAL HISTORY On a level with the maxillary notch is a small premaxillary foramen h'ing at the junction of the two parts of the premaxilla. The maxillae are unusually broad and closely approximated at the vertex. The posterior external border, from the frontal to the supraorbital process, is a straight edge which gives the appearance of oblique truncation of both maxilla and frontal. The maxilla does not overspread the supraorbital process com- pletely but leaves a border of several millimeters in width throughout the le
. Bulletin. Natural history; Natuurlijke historie. 78 PEABODY MUSEUM OF NATURAL HISTORY On a level with the maxillary notch is a small premaxillary foramen h'ing at the junction of the two parts of the premaxilla. The maxillae are unusually broad and closely approximated at the vertex. The posterior external border, from the frontal to the supraorbital process, is a straight edge which gives the appearance of oblique truncation of both maxilla and frontal. The maxilla does not overspread the supraorbital process com- pletely but leaves a border of several millimeters in width throughout the length of this process. The maxilla is thicker at. Fig. 16. Miodelphis californicus (holotype), lateral view. x25. For explanation of lettering, see Fig. 1. the anterior than at the posterior border of the supraorbital process of the frontal. Two foramina occur in the maxilla. One is on a level with the center of the supraorbital process and 6 mm. from the premaxillary boundary; the other occurs mm. behind the first one. The left maxilla shows erosion at its pos- terior extremity, where it overlaps the frontal. The nasals are lacking in this specimen but will be discussed with individual 2. The frontals are large and rectangular in outline, as exposed on the vertex of the skull, with posterior, oblique extensions between the maxillae and supraoccipital. The exterior edge of the frontal shows a smooth and barely perceptible union with the maxillary. The frontal slopes slightly externally and posteriorly. The supra- occipital reaches forward to the frontals in a high sharp arc which differs considerably from individual 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 Peabody Museum of Natural History. New Haven : The Museum
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