CORYPHODON. 
215 
of the angle is slightly deflected. The condyle has great transverse extent, 
and presents upward externally and partly backward internally. The coro- 
noid process rises from the plane of the condyle a little in advance of it, 
and is recurved at the apex; its anterior face is wide from the base to the 
summit. The profile of the symphysis descends at about an angle of 45°, 
and then curves backward in the plane of the rami. Its anterior face is 
rather flat, and its incisive border broadly convex, as in C. elephantojpus, and 
not produced forward, as in C. radians. 
The canines are large and acute, and are directed at an aaigle of 45° 
upward, and 90° outward, the apices turned backward; the crown is sub- 
triangular, and has a slightly alate anterior angle. External face convex, 
and without angle. Eacli is in contact with the external incisor, but is 
separated from the first molar by a diastema. There are five premolars on 
each side in this specimen, of which the second is probably intercalated 
abnormally, as it is smaller than the others. The crowns of the premolars 
are elevated, and their posterior crests short. The true molars are charac¬ 
terized by their short antero-posterior diameter as compared with their 
transverse. The anterior descending crest is but little marked, and its 
termination at the inner'extremity is not prominent as in other species. 
The anterior transverse crest is distinctly higher than the posterior, and its 
posterior face is scarcely marked by the connecting ridge. The latter is 
well marked on the front of the posterior crest, while a very narrow ledge 
represents the wide cingulum of such species as the B. lomas. Enamel 
generally rather finely rugose. The premaxillary bone is short and elevated, 
and its teeth are large and with a rudimental cingulum on the outer face. 
Superior canine with triangular section of the crown. It is directed slightly 
outward, and curved slightly backward. The anterior face, though not 
much worn, has lost its coat of enamel through attrition with the inferior 
canine; it is nearly as wide as the slightly convex postero-internal face. 
The external face is nearly as wide as the anterior, is slightly convex, and 
bears on the proximal half one-third the width from the posterior border, a 
straight ridge, which is parallel with the anterior border. This ridge is not 
present in the teeth of C. elephantopiis, C. lohatus, etc., but is present and 
longer in C. molestus. The canines are particularly large and acute in the C. 
