OF DENISON UNIVERSITY. 9 



of the quadrato-jugal. The lachrymal bone is very large and hoe- 

 shaped, occupying the whole anterior aspect of the orbit. A very 

 slender curved process extends backward from its lower angle. The 

 lachrymo-nasal space between this and the maxillary permits the free 

 movement of the beak on the skull. The lachrymo-nasal foramen is 

 quadrate. The optic foramen occupies its usual position on the mar- 

 gin of the ali-sphenoid, which is inseparably united with the septum 

 intraorbitale and this with the ethmoid still farther forward. There 

 is a large irregular foramen above the optic. The greater part of the 

 side of the skull behind the orbit is formed by the squamosal^ which is 

 strongly ridged and forms, first, a strong flange-like process behind the 

 orbit and, second, a very long process projecting forward toward the 

 corresponding process of the lachrymal. The orbito-sphenoid was not 

 detected as a distinct bone, but irregular processes on the ali-sphenoid 

 may represent it. The sclerotah are membranous bones, which unite 

 to form a ring about the globe of the eye. As seen from below, sev- 

 eral new bones appear. At the back of the skull is the large foramen 

 magmmi, suhcordsite and quadrate in form and about .20 in width. 

 Above, it is bounded by the supraoccipital^ laterally by the exoccipitals, 

 and below by the basioccipital. These bones are intimately united 

 and the sutures quite obliterated. There is an impressed line on 

 either side the foramen. The single occipital condyle is' a small knob- 

 like process. The basioccipital is quadrate and near its lateral mar- 

 gins are the foramina of the carotid and the seventh, ninth, tenth and 

 eleventh nerves. The squamosal expands into a large shield-like cov- 

 ering over the auditory meatus. Just inside of the quadrate bone can 

 be seen a bony sheath which indicates the former point of union of the 

 Meckel's cartilage. Within the meatus the minute auditory ossicles 

 can be seen with a glass. The sphenoid is a pyramidal bone, soon be- 

 coming a vertical plate fusing with the ethmoid and inter-orbital sep- 

 tum. Here also the obliteration of sutures is complete. The vomer 

 is present but inconspicuous. The maxillaries form the sides of the 

 beak and, in connection with the premaxillary, form a continuous bony 

 ceiling to the roof of the mouth, which is covered with a thick horny 

 sheath, so thickened on the edges as to make the knife-like cutting 

 tomia. T\\^ palatals are movably articulated to the edges of the max- 

 illaries by broad bases so that they nearly meet on the median line and 

 reach nearly to the jugal, externally. Posteriorly, the palatals extend 

 into forked processes, making the whole length .40 of an inch. From 



