EXPLANATION OF PLATE VL 



FIGURES. 



1. Notary ctes tyiMops. Lateral view' of skull. 



a, triple ridge on vertex for attachment of nuchal muscles (x 2). 



al, alisphenoid. 



&o, exoccipital. 



m, mastoid. 



oc, occipital condyle. 



fy, tympanic. 



2. Foreshortened view of lower ja"\\- (x 2). 



c, condyle. 

 n, angle. 



3. First maxillary molar, internal view. 



4. " " " external view. 



5. " " " view from in front and a little below. 



6. " " " plan. 



(X 6). 

 alv, alveolar border 

 2), level of palate 

 The remaining letter-references to plates 3, 4, 5, and 6 are sufficiently 

 explained in the text. Similar letters refer to corresponding parts. 



7. Second mandibular molar, internal view. 



8. " " " external view. 



9. " " " plan. 



10. " " " view from in front and a little inside. 



(x6). 

 The letter-references are sufficiently explained in the text. 



11. Lateral view of the teeth, showing the relation of the maxillary and 



mandibular series (x 4). 



e, the lower canine. Immediately behind this, the tooth, de- 

 scribed in the text as the first mandil)ular premolar, is 

 missing in the specimen from which the drawing was made. 



