LTST OP WALDRON POSSIIjS, 



407 



WALDRON FAUNA— Continued 







HartsviUe. 



Vernon. 



Dupont. 



Paris. 



Hanover. 



p I. ■ f . ,14. II 



X 

 X 

















1 





.... 







X 









Cf:PHALOI'()DA. 



X 

 X 

 X 

























Orthoceras subcancellatum, Hall 













Orthoceras undulatura, His 



X 

 X 



























: XX XX xxx: 

















































Cornulitcs proprius H<ill 



x 

 x 



X 



X 







ORTISTACEA 



RpvripVii?* crr^iTiiilnQn TTsill 















X 











X 

 X 

 X 

 X 



X 





■ 





Homalonotus delphinocephahis, Green 











Cyphaspis chrystyi , Hall 



X 



.... 









Acidaspis fimbriata, Hall 













X 















xxxxxxx: 







































X 









X 



Dalmanites bicornis, Hall 







Lichas breviceps, Hall 











Lichas boltoni, var. occidentalis, Hall 



X 













1 





Relation of the Waldron to Preceding and Succeeding Faunas. 



The amount and kind of difference which distinguishes the 

 Waldron fauna from that of the Laurel limestone which was its 

 immediate predecessor in this region is a matter of much impor- 

 tance in connection with any adequate interpretation of the history 

 of the fauna. Comparison of the Waldron fauna with the fauna 

 which preceded it is necessary in order to ascertain what elements 

 if any are of foreign and what of indigenous origin. For the 

 purpose of such comparison a list of the fauna of the Laurel lime- 

 stone which preceded the Waldron is introduced here. In order 

 to make the list as complete as possible all of the species which 

 have been recorded from this fauna are included in it. 



