Evans.] 



A New Cestraciont Spine 



401 



It is interesting to note that occurring in the lower Triassic, its 

 affinities are so close with some of the Carboniferous species. 



Probably a better knowledge of the ichthyic fauna of our 

 early Triassic will attend a further study of the Idaho beds. 



University of California, 

 May, 1904. 



