22 PROCEEDINGS OF THE NATIONAL MUSEUM vol. G6 



The superior margin of the ramus ascends gradually in an even 

 curve, but because of crushing the inferior margin of the left ramus 

 (pi. 2) is continued backward for a distance of 180 mm. in an 

 essentially straight line and then slopes abruptly downward for 120 

 mm., curving upward beyond this point and terminating below the 

 condyle. Originally the posterior margin of the angle may have 

 been more nearly straight, for it is imperfect on both rami. By 

 making due allowance for crushing and distortion it appears that 

 the greatest depth (estimate 100 mm.) of the ramus at the coronoid 

 was equal to less than one- third of the length of the jaw (341 nun.) 

 posterior to the symphysis. The condyle is sub-quadrate in outline, 

 directed backward and outward. 



When viewed from the ventral side it becomes apparent that there 

 is no well-defined longitudinal groove on either ramus. In its place 

 there is a series of small channels which occupy the same relative 

 position. On the right ramus there are at least seven foramina, and 

 from these channels of varying lengths extend forward. Four 

 foramina and their associated channels are present on the left 

 ramus. Between these foramina and their channels the ventral 

 surface of the combined rami is convex. The convexity of this 

 surface is interrupted mesially by the suture following the line of 

 fusion of the two rami. 



Measurements of the mandible 



mm. 



Length of right mandible as preserved (condyle to tip) 644. 5 



Length of right mandible, estimated (condyle to tip) 734. 5 



Length of left mandible as preserved (condyle to tip) 647 



Length of left mandible, estimated (condyle to tip) 737, 5 



Greatest breadth of combined mandibles at extremity 15 



Greatest depth of combined mandibles at extremity 10. 4 



Greatest breadth of combined mandibles at proximal end of symphysis 49. 2 



Greatest depth of combined mandibles at proximal end of symphysis 27. 2 



Greatest depth of right mandible at level of proximal alveolus 43. 5 



Greatest depth of left mandible at level of proximal alveolus 41. 7 



Breadth of mandible at base of coronoid 20. 5 



Greatest length of ankylosed symphysial portion of ramus as preserved — 319 



Greatest length of ankylosed symphysial portion of ramus, estimated 407 



Length of right alveolar gutter as preserved 422 



Length of left alveolar gutter as preserved 420 



Depth of condyle of right mandible 33. 2 



Breadth of condyle of right mandible- 29. 5 



SCAPULA 



In contour and size this scapula corresponds in a general way with 

 that of Inia geo-ffreTisis. Posteriorly, most of the bladelike expanded 

 region (pi. 6, fig. 1) above the neck, including the greater portion of 



