224 



{• \RBONIFEROUS FORMATIONS AND FAUNAS OF COLORADO. 



SALIDA. 



Only two Mississippian collections arc pi-cspiit from Salida, and only four species 

 arc represented. The correlative force of this fauna, Iheri'forc, is very slight indeed. 

 As, however, it was derived from the horizon of the Leadville limestone, and as all 

 the species save one occur in the Crested Butte quadrangle, and that one, a Se7n Inula, 

 is similar to a species occurring in the Madison limestone, it will be safe to unite 

 these localities with the Leadville limestone fauna. It should be remarked, how- 

 ever, that its affinities appear to be with the group of faunas obtained at Aspen and 

 in the San Juan and Crested Butte areas rather than with the faunas of the typical 

 Leadville limestone at Leadville, or those of the Front Range. 



Taisle V." — Tuhle shoti'inff distribution of Misnssippian .yjea'es in the Leadville limestone of Salida and the 



Monarch district. 



. 



2360. 



2361. 



Total. 





CtELENTERATA., 



X 

 X 



X 



X 

 X 



1 



Syringopora surcularia 



1 



Spirifer centronatus . . - 



BKACHIOPODA. 



2 





1 









CANTON. 



The fossils in this group are from the vicinity of Canj-on, and were collected 

 by T. W. Stanton. Pai't of the material came from the Harding's quarry locality, 

 and were mentioned by C. D. Walcott,* being identified as Spirifera rockywontana 

 and Athyris svitilita. In view of the geologic proximity of the localities and the 

 identity of the faunas, these collections might appropriately have been considered 

 with those collected by Whitman Cross from the Pikes Peak quadrangle. I have, 

 however, kept them separate. The fauna, which is preserved in chert, comprises 

 onl}' six species, and was derived from two localities. The following table shows its 

 distribution and local representation: 



a For a description of the localities indicated by number in this table Fee locality register, pp. 519-532. 

 ^Geol. See. Am., Bull., vol. 3, 1892, p. 157. 



