PRESACRAL YERTEBRiE OF ICHTIITORNIS. 131 



preceding vertebra, being only about half as long as the pre-zygapophyses, 

 and looking almost directly downward. Tbey are surmounted on each 

 side by a blunt tubercle pointing outward and backward, but much less 

 salient than iu the Tern. The neural spine was moderately strong, but is 

 much broken in the specimen here described, number 1733. 



Full measurements of the third cervical vertebra of Iclitlvyomis victor 

 are given below: 



Measurements of Third Vertebra. (No. 1733.) 



Length of centrum, 6.0 mm 



Transverse diameter of anterior articulation of centrum, 2.5 



Vertical diameters of anterior articulation of centrum, 1.8-1.0 



.Transverse diameter of posterior articulation of centrum, 2.0 



Vertical diameter of posterior articulation of centrum, 2.7 



Transverse diameter of neural canal, 2.6 



Vertical diameter of neural canal, 2.0 



Transverse diameter of vertebra, across pre-zygapophyses, 7.5 



Transverse diameter of vertebra, across post-zygapopliyses, 9.2 



Transverse diameter of lateral foramen, 0.8 



Vertical diameter of lateral foramen, 1.1 



The Tenth Veetebka. (Plate XXVII, figure 3). 



A vertebra from the cervical series, in number 1733, appears to 

 correspond best to the ninth cervical of Sterna regia, with which it may be 

 compared. The inferior surface of the centrum is flattened laterally, but 

 concave longitudinally. The anterior articulation is somewhat crushed 

 below, but seems to have been concave in both directions, and of a sub- 

 quadrate form. The posterior articulation is more rounded, but has a 

 nearly straight upper .margin. It is about equally concave in both direc- 

 tions, and rounded x»n the edges. 



From the antero-lateral regions of the inferior surface of the centrum, 

 are two projecting processes, or catapophyses, extending downward and 

 somewhat forward to a distance nearly equal to the vertical diameter of the 

 anterior articulation of the centrum. 



Above and external to these, on each side, are the parapophyses, 

 united to the diapophyses by the ankylosed pleurapophyses, which 



