Holland : Crocodile From Montana. 285 



Extreme length across zygapophyses 160 ± mm. 



Length of centrum at middle 150 



Length of centrum along floor of neural canal 90 



Vertical diameter of centrum in front 130 



Transverse diameter of centrum in front 105 



Vertical diameter of centrum behind 1 10 



Transverse diameter of centrum behind 85 



Vertical diameter of neural canal 53 



Transverse diameter of neural canal 35 



Height of spine above neural canal 158 ± 



Height of spine above postzygapophyses 105 



Height of spine above prezygapophyses 155 



Antera-posterior diameter of spine at base Ho 



Antero-posterior diameter of spine at top 67 



Transverse diameter of spine at base posteriorly 28 



Transverse diameter of spine at base anteriorly 10 



Transverse diameter of spine at top 40 d= 



Distance across postzygapophyses 200 



Distance across prezygapophyses at their base 230 ± 



Cervical Rib. 



(C. M. Cat. Vert. Foss., No. if*. ) 



A fairly well preserved specimen of the first cervical rib of the left 

 side was found. At its proximal end it has been somewhat broken, but 

 not enough to greatly diminish its length. Its proportions and general 

 appearance are represented in Fig. 5, a representing the inner, and b 

 the outer surface of the bone. 



Dimensions. 



Greatest length 235 mm. 



Width at proximal end 3J " 



Smallest width at proximal end 28 " 



Greatest width in distal half 5 l 



Width at distal extremity 17 



Transverse diameter at proximal end 18 



Transverse diameter at distal end 8 " 



Dorsal Ribs. 



(C. M. Cat. Vert. Foss., No. If 8.) 



A fairly well preserved specimen of the first dorsal or thoracic rib 

 of the left side was recovered. Its shape is represented in Fig. 6, A 

 showing the posterior, and B the anterior surface of the rib. It had 

 been broken about the middle of the shaft and was repaired in the 



a 

 1 1 



