196 ANNALS NEW YORK ACADEMY OF SCIENCES 



present, which reduce the palatal width at the first of the molar alveoli to 

 less than half the width anteriorly. The palatal border of the preorbital 

 fossa is a regularly curved line. When the skull is viewed in profile, the 

 palate slopes rather abruptly downward posteriorly, making the rostrum 

 much deeper at the first tooth of the molar series than it is at the canine. 



Measurements of crankim: Width of rostrum just anterior to zygo- 

 matic roots, 31.5 mm. ; greatest width of rostrum, at outside of canine 

 alveoli, 36 mm. ; width of palate between preorbital foss^, 13 mm. : width 

 of palate between canines, 13 mm. ; length of palate back to first molar 

 alveolus, 28 mm. ; greatest antero-posterior extent of preorbital fossa, 23 

 mm. ; greatest vertical depth of fossa, 16 mm. ; width of canine just below 

 worn surface, 11 mm. ; thickness of canine, antero-posteriorlj^ same point, 

 9 mm. 



Mandibular ramus. — The rami are fragmentary, pieces of both sides 

 and the symphysial junction being found, but give the following charac- 

 ters (see Plate X, Figs. 3-6) : 



The ramus is deep with a wide ascending portion. The molar alveoli 

 are deep and of large size. The canine alveolus is three sided to match 

 the condition found in the maxillary. The canines are large, apparently 

 of nearly the same size as the upper canines, flaring apart externally but 

 meeting at the roots. There is no space for a very wide median sym- 

 23hysial tongue, but a shallow interior concavity or groove is present. . The 

 diastema between the canine and pm4 is very short. Pm4 and nig are 

 larger than m^ and m,, nig appearing to be the largest of the series. The 

 molars are subrectangular to roughly cylindrical in cross-sectio]i. The 

 inferior dental foramen is large. 



Measurements of ramus: Depth at anterior edge of ascending portion 

 (approximate), 25 mm.; depth at pm^, 21 mm.; antero-posterior width 

 of alveolus of pm^, 8 mm.; width of alveolus of m^, 7 mm.; width of 

 alveolus of mg, 10 mm. 



Tlumeru^ (Plate IX, Figs. 1-2). — Only the middle portion of a hu- 

 merus (the left) was saved, but this part is sufficient to shoAV that the bone 

 is rather slender and much ridged for muscle attachment. The deltoid 

 ridge is large and prominent, giving to the anterior face of the limb a 

 very flat aspect, while there is a long sharp ridge paralleling the deltoid 

 develojDed along the internal side of the humerus for attachment of the 

 pectoralis muscle. This ridge is deep and terminates distally in a notice- 

 able knob-like projection. A cross-section of the humerus through these 

 two ridges would be quite rectangular in outline. There is a noticeable 

 ridge on the inner posterior aspect of the humerus, extending downward 

 nearly as far as the deltoid ridge, for the attachment of the latissimus 



