134 ODOXTORNITHES. 



Transverse diameter o£ vertebra, across diapophyses, 10,0 mra 



Transverse diameter, across pre-zygapophyses, T.6 



Transverse diameter of vertebra, across post-zygapophyses, 1.0 



Vertical diameter of neural canal, 2.4 



Transverse diameter of neural canal, 2.6 



Greatest diameter of lateral foramen, 2.6 



Least diameter of lateral foramen, 2.0 



Height of neural spine, above floor of neural canal, 4.8 



The Fourteenth Vertebra. (Plate XXII, figure 2.) 

 Another vertebra (number 1450) is probably the fourteenth of the 

 series. The centrum is narrow at the middle, but is rounded below, and 

 sends down anteriorly a strong hypapophysis, which is broad, and slightly 

 bifid. The anterior face is sub-circular in outline, slightly flattened above, 

 and concave. The posterior face is similar in shape, and a little more 

 concave. The lateral foramina are somewhat imperfect, but the diapophysis 

 is strong, and the pleurapophysis projects well backward. The diapophysis 

 projects below, and outside of the pre-zygapophysis. The neural canal 



The pre-zygapophyses look somewhat backward, and strongly inward 

 and upward, and are separated from the post-zygapophysis by an interval 

 about equal to then- length. The post-zygapophyses look downward and 

 outward, and are each surmounted by a low tubercle. The roof of the 

 neural canal is short on the median line, with a shallow pit in front. It 

 has a barely perceptible rudiment of a spine, and a transversely oval 

 pit behind, looking directly backward. There appear to be pneumatic 

 foramina at the sides, and also below, on the sides of the centrum. 



This vertebra of the type specimen of Ichtliyomis dispar measures 

 as follows : 



Measurements of Fourteenth Yertebra. (No. 1450.) 



Length of centrum, 6.0 mm 



Vertical diameter of anterior articulation of centrum, 2.4 



Transverse diameter of anterior articulation of centrum, 2.8 



Length of hypapophysis, 2.0 



Vertical diameter of posterior articulation of centrum, 2.5 



Transverse diameter of posterior articulation of centrum, 2. 7 



Transverse diameter of vertebra, across diapophyses, 10.2 



