1 8 E. C. CASE 



MEASUREMENTS OF THE SIXTH CERVICAL. 



Length along bottom line of the centrum . . . - 002911 

 Height of centrum from bottom to bottom of notch beneath post- 



zygapophyses --------- 0.030 



Width post-zygapophyses - - - - - - - 0.040 



Vertical and horizontal diameters of the posterior face of the cen- 

 trum .--.._..-. 0.033 



The seventh cervical (Fig. 14) has the centrum relatively 

 higher and shorter than the preceding, and the keel is much more 



Fig. 14. — Seventh cervical. — a, anterior face of the centrum; b, posterior view of 

 vertebra; c, side view. % natural size. 



prominent. The edge of the keel forming the lower edge of the 

 centrum is nearly straight. The intercentrum is absent, and the 

 recurving of the lower portion of the edge of the anterior face 

 in forming the face for the centrum shows very prominently the 

 "twisted" appearance described by Cope. The transverse pro- 

 cess rises from the neural arch quite above the neural canal and 

 the centrum and decurves close to the side of the centrum. 

 There is no trace of the ridges which supported the transverse 

 process on the centrum in the anterior vertebrae; its distal end 

 does not reach below the lower edge of the centrum. The trans- 



