A NEW FOSSIL PACHYDERM. 263 



These two molars are inserted in a line slightly oblique outwards 

 with reference to the long axis of the bone ; the first molar contin- 

 ues this line, but the roots of the premolar, as well as a slight flex- 

 ure in the bone, indicate that the line of insertion there changes 

 its direction by bending inwards, to a degree which would probably 

 make it parallel with the line of the opposite side. This agrees 

 with the inference from the form of the first superior molar, and also 

 with the shape of the cranium hereafter described. The dentition 

 as far as determined is, — 



inc. ^—^ can. L^^ prem. 1^^ mol. |^^ 

 which agrees with the general formula for the Tapiroidea ; to which 

 group of Pachyderms the teeth, from their separate characters, 

 would most naturally be referred. 



The measurements of the teeth described, in English inches, are 

 as follows : — 



Leneih. Breadth. Length. Breadth. 



1st superior premolar, .35 .32 1st inferior molar, .46 ? 



2d " " .41 .47 2d " " .60 47 



3d " " .43 .50 3d " " .78 .45 



4th id. (from larger spec), .50 .46 Dimensions of superior canine. 



1st molar (larger spec), .65 "55 Length of exserted part, 1.59 



2d molar, .61 .55 Breadth of lateral surfaces at base 



3d molar, .77 of exserted portion, .50 



(Breadth anteriorly, 62 ; post., .56.) Thickness of tooth, .30 



Bones of the Head. 



The portions of the skull obtained are, — the anterior part of the 

 upper jaw ; the posterior part of the os frontis ; part of one os mala- 

 rum, with the os lachrymale ; portions of the palatal plate of su- 

 perior maxilla ; and the posterior part of the inferior maxilla. 



The first-mentioned fragment is represented, fig. 1, side view ; 



