PYROTHERIUM SORONDOI ISI 
no space left for it in the front of the mandible, just as it 
was reduced and lost in the development from Moeritherium 
to Polymastodon or equivalent types. 
Fig. 114. Lower dentition—1/5 natural size; edges of teeth broken off in my specimen are 
indicated in outline. 
Lower DENTITION SPECIMEN AMEGHINO’sS GAUDRY’S 
No. 3207 TYPE SPECIMEN 
Incisor 2 to molar 3, length 510 mm. 540 mm.* 415 mm.* 
Premolar 2 to molar 3, length 325 mm. 280 mm. 272 mm. 
Inc. 2, length above alveolus 133 mm. 188 mm.* 168 mm.* 
Inc. 2, antero-posterior diam. 55 mm. 60 mm. 66 mm. 
Inc, 2, transverse diam. 40 mm. 36mm. 44 mm. 
Premolar 3, length 46 mm, 50 mm. 54 mm. 
Premolar 3, width 36 mm. 31 mm. 35 mm, 
Premolar 4, length 55 mm. 45 mm. 50 mm. 
Premolar 4, width 46 mm. 45 mm. 47 mm. 
Molar 1, length 65 mm. 50mm. 51 mm. 
Molar t, width 59 mm... 52 mm. 54 mm. 
Molar 2, length 73) iin. 56) mim. 66) mm. 
Molar 2, width 73mm. 63 mm. +66 mm. 
Molar 3, length 69 mm. 67 mm. 7I mm. 
Molar 3, width 74 mm. 66mm. 69 mm. 
Four cervical vertebrae were preserved with the skull 
number 3207, of which only about a third of the atlas is 
represented, but fortunately we found a complete atlas 
isolated and of the same size. The measurements for 
the atlas are taken from this separate specimen. While 
my skull, especially the teeth, seems to have been larger 
than the skull Gaudry described, the cervicals are a little 
smaller. I give the measurements of the cervicals which 
we found, comparing them with the figures given by 
Gaudry. 
* Figures taken from illustrations. 
