140 



ON THE EXTINCT MAMMALIA OF 



Notwithstanding I have been led to distinguish three species of Agriochcerus, I am 

 inclined to suspect that all the specimens really pertain to a single one, and the 

 differences which have been indicated are perhaps partly sexual, and in part of the 

 character of individual variation. 



The following are comparative measurements of the skull of A. latifrons and the 

 corresponding parts of J., antiquiis: 



A. latifrons. A. antiquus. 



Lines. Lines. 



Estimated length of skull from occipital condyles to incisors. 

 Estimated length of cranium from inion to fore part of sagittal 



crest, .... 



Estimated breadth between the zygomata. 

 Greatest breadth of cranium at the convexity of the squamosals, 

 Breadth at nari'owest part of the cranium, 

 Vertical diameter of the orbits. 

 Breadth of forehead at post-orbital processes. 

 Breadth of face at middle of last molars, . 

 Breadth of face at infra-orbital foramina, . 

 Breadth of face at ant-orbital margins, 

 Height of forehead from alveolar border, . 

 Length of lower jaw, partially estimated, . 

 Breadth of ramus obliquely, back of the last molar, 

 Depth of jaw at condyle, . 

 Depth of jaw at coronoid process, . 

 Depth below fore part of last molar. 

 Depth below second premolar. 

 Estimated length of symjihysis, 

 Length of upper molar series of seven, 



" " " except first. 



Length of lower molar series of six, 



" " except first, 



Length of upper true molar series, 

 Length of lower true molar series, 



102 



The following are comparative measurements of molar teeth oi Agriochcerus: 



