13 



No. 2. 



r antero-posterior 

 Diameter do. without hypapophysis^ vertical 



' transverse 

 No. 3. 



/ antero-posterior 

 Diameter do. without hypapophysis -? vertical 



' transverse 

 No. 4. 



! antero-posterior 

 vertical 

 transverse . 

 No. 5. 



! antero-posterior 

 vertical 

 transverse 

 No. 6. 



! antero-posterior 

 vertical 

 transverse . 

 No. 7. 

 r antero-posterior 

 Diameter of an anterior caudal \ vertical 



i. transverse 

 No. 8. 



/ antero-posterior 

 Diameter of a median caudal < vertical 



' transverse . 

 No. 9. 



! antero-posterior 

 vertical 

 transverse . 



M. 



.017 



.0165 



.017 



.011 



.0105 



.011 



.023 

 .023 

 .023 



.008 



.0072 



.0075 



.010 

 .009 

 .009 



.083 

 .053 

 .058 



.017 

 .011 

 .011 



.014 



.0086 

 .007 



A vertebra not distinguishable from the corresponding one of 

 this species was found near Amell's Creek, on a bank of deposit 

 of the Fox Hills group (No. 5), with the bones of the Uronautes 

 cetiformis, supra. I cannot account for this circumstance, as it 

 is the most abundant fossil of the Judith River beds (No. 6). 



Champsosaurus brevicollis, sp. nov. 



On one occasion the writer discovered a number of vertebrae 

 of this genus close together, and in such relation as to induce the 

 belief that some of them belonged to the same individual. Parts 

 of several were obtained, however, adding another evidence of the 



