131 



[ihysLs in the position of this socket indicates its caniiic-likc leelh to have 

 been accoaimodatcd when at rest iu a recess of the upper jaw at the junction 

 of the premaxillarics and inaxiikiries. 



Succeeding the canine tooth alveolus, there are the remains and sockets oi" 

 five comparatively small teeth. Then followed several ol' the largest teeth 

 accommodated by the second expansion of the jaw. The socket for the 

 eleventh tooth is about the size of that of the canine tooth. In the left ramus 

 it retains the tooth, the apex of which alone had protruded. After tliis tooth 

 there followed a series of five others which successively decreased in size. 



Measurements of the lower jaw are as follows : 



Incbes. Lines. 



LeDgth of rami of lower jaw 20 G 



Width of lower jaw outside the glcuoid articn]ation.s 12 



Width of lower jaw a short distaace in front of the glenoid articulatious.. 13 



Greatest width of symphysis 4 o 



Width of jaw at second enlargement, below the eleventh tooth (J 



Depth of jaw at oval foramen 3 10 



Depth of last tooth 2 8 



Depth of eleventh tooth 2 4 



Thickness below the eleventh tooth , 2 2 



Depth of ramus near symphysis 1 !) 



Thickness of ramus near symphysis 2 2 



Extent of symphysis fore and aft 4. 3 



Breadth of glenoid articulation 2 7 



Length of hook-like process back of glenoid articulation 2 5 



Space occupied by the teeth 11 



Length of oval foramen 2 8 



W^idth of oval foramen .' 11 



Fig. 1, Plate VIII, represents the body apparently of a first Inml^ar verte- 

 bra; and Fig. 5 of the same plate, the proximal extremity of a left femur, 

 large enough to belong to the same animal as the cranium above described. 



rp 



The two specimens were found together by Professor Hayden's party near 

 Little Sandy Eiver. They present no decided peculiarity distinguishing them 

 from the corresponding part in the living crocodiles. The shaft of the femur 

 contains a medullary cavity larger than usual in the latter, and in the specimen 

 it is filled with chalcedony. 



The measurements of the specimens are as follows: 



Line.s. 



Length of body of first lumbar vertebra beneath 20 



Depth of body anteriorly 18 



Width of body anteriorly ' 18 



Width of head of the femur 20 



Diameter of shaft below the inner process 12^ 



