238 



DR. A. S. WOODWARD ON THE 



[Apr. 18, 



nerve. The twenty-first vertebra of the same series (text-fig. 44) 

 is essentially similar, but more elongated, without any trace of 

 the transverse process, and with the laminar neural spine con- 

 siderably overhanging the centrum behind. 



Text-fie-. 43. 



Cetiosaurus leedsi. — Middle caudal vertebra; left lateral, (A) anterior, and 

 (B) posterior aspects, as., prezygapophj^sis ; pz., postzygapophysis ; tr., 

 transverse process. About ^ nat. size. 



Text-fi^. 44. 



Cetiosaurus leedsi. — Posterior middle caudal vertebra ; left lateral, (A) anterior, 

 and (B) posterior aspects, as., prezygapopbysis ; ps., postzygapophysis. About 

 i nat. size. 



The last-described vertebia might w^ell be named a posterior 

 caudal, were it not known from American specimens of Dijjlocloctts 

 that the tail of the Saui'opodous Dinosaurs was furnished witli a 

 long terminal lash. This slender appendage was certainly present 

 in Cetiosaurus, for Mr. Leeds has discovered in the Oxford Clay 

 a chain of ten small vertebipe precisely similar to the terminal 



