624 Bulletin American Mtcseum of Natural History. [Vol. XIX, 



The following additional species were taken from these beds 

 by the American Museum party : 



Elephas imperator , Platygonus sp. ind. 



Equus scotti, Large carnivore, gen. et sp. ind. 



Pliocene. 

 Blanco Beds. 



The Blanco beds have been correctly referred to the Pliocene 

 age, as is shown by the peculiar fauna they contain; Cummins 

 has, however, given them a much wider distribution than is 

 evident from a close study of the formations in that region. 

 He says of these beds \* "This formation constitutes the 

 eastern scarp of the Staked Plains from the Double Mountain 

 Fork of the Brazos River on the south to Paloduro Canyon on 

 the north." 



Cope also reported exposures of these beds northeast of 

 Miami, Roberts County, Texas, more than one hundred and 

 fifty miles to the north of Mount Blanco. His identification 

 was founded on some fossil horse teeth which he referred to 

 Equus CMinniinsii Cope. This species, as has been shown by 

 the writer in a former paper, ^ is not referable to the genus 

 Equus, and is indistinguishable at present from some species 

 of the Loup Fork Protohippus, hence the correctness of Cope's 

 identification of Blanco beds at Miami is, at least, doubtful. 



Cummins was probably led to error by including in his 

 section of the Blanco beds strata properly belonging to beds 

 of an older age. 



Cummins's sections of the Blanco beds, taken at two differ- 

 ent localities, are as follows 3 : 



At Mount Blanco. 



1 2 . Soil 8 feet 



1 1 . Hard limestone 2 " 



10. Sandstone 3 " 



9. Stalactitic limestone 4 " 



8. Calcareous sandstone 4 " 



7. White sandy clay 30 " 



6. White diatomaceous earth 4 " 



5. Packsand 20 " 



' Geol. Surv. Texas, 4th Ann. Rep., 1892 (1893), p. 201. 



Bull. Am. Mus. Nat. Hist., Vol. XIV, pp. 126, 127. 

 ^ Geol. Surv. Texas, 4th Ann. Rep., 1892 ( 1S93), pp. 200, 201. 



