272 



Liucs. 



Depth of specimen represented in Fig. 1, Plate XXXV , 44. 2 



Breadth of specimen - CO. 



Depth of second specimen 42. 



Breadth of second specimen 01. (J 



Depth of specimen represented in Fig. 2 39. 8 



Breadth of specimen 63. 



In the other three sijecimens, consisting of nearly complete dorsal centra, 

 and measuring about 4J inches in Jength, the compression is still greater. 

 In one of the specimens the distal articulation, represented in Fig. 3, is so 

 flattened as to appear transversely lenticular in outline and emarginate above. 

 It measures 30 lines in depth and 62J lines in breadth. 



Seven selected specimens consist of caudals which have mostly undergone 

 little or no compression. They all pi'esent beneath a pair of strong processes 

 projecting obliquely backward from nearer the posterior part, and excavated 

 ill a conical pit directed backward and downward for articulation with chev- 

 rons. Three have been provided with strong diapopliyses projecting in 

 advance of the middle and nearly half way up the sides. A fourth specimen 

 has a small, narrow diapophysis projecting in advance of the middle and 

 about two-thirds up the sides. The remaining two vertebrae have no dia- 

 popliyses. 



The caudals with diapopliyses have the articular ends of the body trans- 

 versely oval, witli a slightlj' hexahedral outline, emarginate above, and in a 

 less degree below. Tliose without diapopliyses have the articular ends of 

 proportionately less width, of less hexahedral outline, and not emarginate 

 below, so that they appear more cordiform than oval. 



The largest caudal with diapophyses has measured as follows : 



Lines. 



Estimated length of centrum beneath 37.5 



Estimated breadth of articular ends 48. 



Depth of articular ends 42. 



A smaller caudal with diapophyses, less mutilated, and represented in Figs. 

 4, 5, measures as follows : 



Linos. 



Length of centrum beneath 28. 5 



Breadth of articular ends 44. 



Depth of articular ends , , 40. 



The caudal with small diapophyses, represented in Figs. 6, 7, measures as 

 follows : 



