348 C. S. PROSSER 



did not intend to include the rocks in Kansas which he and 

 Hayden had called Permian, 1 a fact which has been overlooked 

 by some of the later writers in considering the rocks of this 

 region or the Permian. This was stated clearly enough by 

 Meek when he gave his views regarding the age of these rocks 

 as follows: "[they] really belong entirely to the true Coal 

 Measures ; unless the division C [the upper fossiliferous one] 

 at Nebraska City, and some apparently higher beds below there 

 on the Missouri, may possibly belqng to the horizon of an inter- 

 mediate series between the Permian and Carboniferous, for 

 which, in Kansas, Dr. Hayden and the writer proposed the 



name Permo-Carboniferous It is true that in first 



announcing the existence of Permian rocks in Kansas, we also, 

 upon the evidence of a few fossils from near Otoe and Nebraska 

 Cities, resembling Permian forms, referred these beds to the 

 Permian; but on afterwards finding that these fossils are there 

 directly associated with a great preponderance of unquestiona- 

 ble Carboniferous species ; and that there is also in Kansas a con- 

 siderable thickness of rocks between the Permian and upper 

 Coal Measures containing, along with comparatively few Per- 

 mian types, numerous unmistakable Carboniferous forms, we 

 abandoned the idea of including these Otoe and Nebraska City 

 beds in the Permian. And all subsequent investigations have 

 but served to convince us of the accuracy of the latter conclu- 

 sion." 2 This view was explained more fully in Meek's Review 

 of Geinitz, on the rocks and fossils of Nebraska, published in 

 the November following his exploration there, in which, after 

 describing a series of rocks occurring in Kansas, containing an 

 extensive Coal Measure fauna, often mingled in the same beds 

 with a few Permian types, he said : " In ascending several hun- 

 dred feet higher in the series, we observed the Coal Measure 

 forms gradually dropping off until at last, above a certain unde- 

 fined horizon, with the exception of one or two of the latter, 



'Trans. Albany Inst., Vol. IV, 1858, p. 76 ; Proc. Acad. Sci. Phil., Vol. XI, 1859, 

 pp. 20. 21 ; and Am. Jour. Sci., 2d ser., Vol. XLIV, 1867, p. 37. 



2 Final Rep. U. S. Geol. Surv. Neb. etc., pp. 130, 131. 



