CEEODONTA. 293 



at the anterior base and a short trenchant heel at the posterior base. Of the 

 three tubercular-sectorials the first is the smaller. The heels of all three 

 are rather narrowed and elongate. The margin is raised all round, inclos- 

 ing a basin; a notch in the external margin cuts its anterior part into a 

 tubercle. The two internal tubercles are rather obtuse, and are consider- 

 ably shorter than the external cusp. 



Measurements. 



M. 



Xength from cauiue to end of last molar 060 



X/Cngth from canine to tirst true molar 037 



Xength from cauiue to secoml premolar 015 



Xength of base of fourth premolar 009 



Elevation of fourth premolar 007 



Xength of base of second true molar 007 



Xength of heel of second true molar 00"26 



Elevation of second true molar ^ 009 



Depth of ranuis at third premolar 015 



Xength of superior canine 028 



Xength of crown of superior canine with enamel 012 



A portion of the frontal bone shows weak anterior temporal ridges 

 uniting early into a sagittal crest, Avhich is low as far as preserved. The 

 parietal bones overlap the frontal as far forwards as the temjDoral ridges. 

 Anterior to the latter the front is concave in transverse section. Viewed 

 from below, the spaces for the olfactoiy lobes are large and entirely anterior 

 to those which received the anterior lobes of the hemispheres; each one is 

 about as wide as long. In the small part of the cerebral chamber wall left 

 there is no indication of convolutions, wliicli would be visible in a gyren- 

 cephalous brain; two air-chambers in front of each olfactory lobe. 



The base of the transverse process of the atlas is perforated from 

 behind to the middle of its inferior side ; from the latter opening a foramen 

 penetrates directly into the neural canal. A posterior dorsal vertebra has 

 the centrum longer than wide and much depressed. Its inferior face is 

 regularly convex in section. The proximal end of the scapula shows that 

 its posterior border is much thickened, and tliat the spine arises abruptly and 

 near to the glenoid cavity. There appears to have been scarcely any cora- 

 coid ; the surface adjoining it is, however, injured. The humerus lacks the 

 proximal portion, and the inner half of the condyles with the epicondyles. 

 The deltoid crest is not very prominent, so that the shaft is rather slender. 



