106 
CKEODONTA, 
The rami are stout, with well-defined masseteric fossa and masseteric 
ridg-e. The anterior extremity rises in a regular open curve with the canine 
teeth, which are directed strongly upward as well as forward. The inferior 
border is thickened, and somewhat flattened, narrowing posteriorly, and 
bounding a longitudinal shallow concavity below the premolar teeth. The 
inner alveolar border is not protuberant. One mental foramen is below the 
first, the other below the fourth premolar. The first one-rooted premolar 
is a stout tooth; there is no anterior basal tubercle on the second and third 
premolars, but a distinct one on the fourth. There is a small compressed 
tubercle at the base of the anterior lobe of the last or second sectorial 
molar, which is acute in front as well as behind. This tooth is larger than 
the penultimate. The enamel of all the teeth is quite rugose, although they 
are well worn by use. 
The premaxillary bone displays the two very small median and large 
exterior premaxillary teeth. The superior parietal walls are a three-sided 
mass of bone, of extraordinary thickness, excavated in front by the large 
cells of the frontal sinus. The sagittal crest is much elevated, and the 
external surface slightly concave at its base. 
Length of the inferior dental series... 0.103 
Depth of the ramus at the last molar. 0. 040 
Depth of the ramus at the second preraolar. .. 0. 030 
Diameter of the canine tooth .. . .... 0. 019 
Length of the premolar series. . 0.035 
Length of the base of the penultimate molar... 0. 016 
Length of the base of the last molar. .. 0. 010 
Width of the base of the last molar-... ...... 0.013 
Elevation of the crown of the last molar. 0. 019 
Width of the penultimate superior molar.. 0. 017 
Width of the sagittal mass of the cranium. . 0.024 
Depth to the base of the crest... . . 0.015 
A second specimen includes inferior molars and canines. The former 
display typical characters; the latter have very stout roots and curved, 
regularly acuminate crowns. The apex is quite acute, and a band is worn 
through the enamel by the friction of the superior canine, commencing on 
the upper side of the apex and extending to the supero-external side of the 
