GEOLOGICAL SURVEY OF THE TERRITORIES. 409 



■whole limb may be determined from these and from the numerous pha- 

 langes. The former are flattened and with oblique extremities ; the latter 

 more cylindric with a transverse truncation. Both have a median con- 

 traction, which becomes less marked in the distal ones ; these are also 

 more cylindric, entirely so at the distal extremities, which are concave. 

 All of these elements are rod-like, much more slender than any of those 

 figured by Cuvier or Leidy. Those immediately following the meta- 

 carpals are flattened, but thicken distally. 



The number of digits cannot be readily determined, bxit four may be 

 certainly distinguished. The general similarity in construction of the 

 manus to that of a cetacean mammal is noteworthy. 



Measurements. 



M. 



Length suspensorium (anteriorly) 0. Ill 



Width suspensorium medially 031 



Quadrate, greatest length - . 099 



Quadrate, width of ala 066 



Quadrate, thickness behiud 03 



Quadrate, length of distal extremity 043 



Pterygoid, length six alveoli 055 



Anterior dorsal, length centrum 059 



Anterior dorsal, width cup 0515 



Anterior dorsal, depth 038 



Anterior dorsal, expanse poster, zygapophyses 0395 



Anterior dorsal, expanse diapophyses 091 



Anterior dorsal with neural canal 0135 



Anterior dorsal, depth neural canal 011 



Posterior dorsal, depth ball 019 



Posterior dorsal, width ball 0425 



Posterior dorsal, length centrum 0555 



Posterior dorsal, expanse diapophyses 088 



Scapula, length 145 



Scapula, width proximal 07 



Scapula, width median 112 



Coracoid, width proximal 066 



Humerus, length 154 



Humerus, width x3roximal 119 



Humerus median 075 



Humerus, distal (restored from C. propython) 158 



Radius, length 115 



Radius, width proximal 061 



Radius, width distal (oblique) 105 



Carpal, length 04 



Carpal, width 037 



Metacarpal, length 095 



Metacarpal, width proxirnally 045 



Metacarpal, width medially 018 



Metacarpal, width distally 034 



Phalange (medial) length 085 



Phalange (medial) width proxiinally 027 



Phalange (distal) length . 059 



Phalange (distal) width distally 0082 



Ramus mandibuli, depth in front of cotylus 056 



Cervical rib, length 074 



