140 



ON THE EXTINCT MAMMALIA OF 



Notwithstanding I have been led to distinguish three species of Agrioclioerv.i, I am 

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

 diflercnccs 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. laiifrons and the 

 corresponding parts of J., aniiqmis: 



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 narrowest 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-oi-bital foramina, . 

 Breadth of face at ant-oi'bital margins. 

 Height of forehead from alveolar boixler, . 

 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 symphysis, 

 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. 



A. latifrons. 



A. antiquus 





Lines. 



Lines. 



ors, 



102 





' sagittal 



40 

 60 





mosals, . 



30 

 15 







13 







40 



28 





44 



34 





27 



18 





42 



29 





30 



84 



23 



' •> 



34 







37 







46 







19 



17 





14 



Hi 





23 







39 







35 

 38 



36 





34 



36 





22 



22J 





24 



25 



The following are comparative measurements of molar teeth oi Agriochoeriis: 



