82 TEETIAET VERTEBEATA OP THE EAYtTM, 



The length of the upper teeth from pm. 2 to m. 3 is therefore about 34'5 cm. against 

 about 26 cm. in A. zitteli. The length of the lower molar series is 23'5 cm., that of 

 the lower premolars 14 cm. The total length of the mandible is 73 cm., its height at 

 ooronoid 43'5 cm.; width of the condyle 12'1 cm.; width of ascending ramus 22'5 cm.; 

 depth of ramus behind m.3, 11"2 cm.; length o£ symphysis 21"5 cm. 



The almost complete cervical vertebra has a centrum which is very short in 

 proportion to its other dimensions. Its measurements are : width of centrum 

 18'5 cm. ; height of ditto 15"2 cm.; length of ditto 4-8 cm. The posterior thoracic 

 and lumbar vertebrse have both lost their anterior epiphyses, indicating that the 

 animal was comparatively young, an inference that is confirmed by the slight degree 

 of wear of the third molar in both jaws. The dimensions (in centimetres) of the 

 thoracic vertebra are : width of centrum 16"2 ; height of centrum 10'5 ; length of 

 centrum without anterior epiphyses 8"2; height to tip of neural spine 24+ ; width at 

 transverse processes 37. The same measurements in the case of the lumbar vertebra 

 are 15'6, 10' 8, d-i, 30, 31"8. The dimensions of the enormously massive humerus 

 are : width of shaft at narrowest 18 ; greatest width of distal expansion 34"5 ; width 

 of distal articulation 23. In form this humerus (text-fig. 38) differs very little from 

 that of the smaller species, except that the condyles are somewhat more prominent. 



The length of the ulna is 60 cm. Its inner face is imperfect. 



Presented hy W. E. de Winton, Esq., 1903. 



M. 8462. Back of skull and axis vertebra found in association. The dimensions (in centimetres) 

 of the skull are : width above auditory opening 41 ; width of roof between temporal 

 fossae 18'5; width between outer angles of occipital condyles 24+; width of foramen 

 magnum 9"5 ; height of ditto 6'5. 



A maxilla and mandible (M. 8462 a, h) found near this skull seem to be too small 

 to belong to the same species ; thus in the maxilla the length of the molar series is 

 only 17 cm., about the same as in A. zitteli. 



■ The dimensions (in centimetres) of the axis are : length along ventral surface to 

 tip of odontoid 17*8 ; width of proximal end 20'3 ; width of posterior face 16. 



Presented by W. E. de Winton, Esq., 1903. 

 M, 8467. Left femur. The dimensions (in centimetres) of this specimen are : length 80 ; greatest 

 width of upper end 28 ; diameter of the head 13'5 ; width of middle of shaft 16"3 ; 

 greatest width of distal end 20"3 ; width of distal articulation 15"7. 



Presented hy W. E. de Winton, Esq., 1903. 



' As above remarked, it is probable that bones of this species may be included amongst those 

 referred to A. zitteli : e. g. the large pelvis (0. 8413) described and figured above may belong 

 here. 



