126 CHARLES S. PROSSER 



stated in my article, and failed to find a single listed species 

 common to the Hueco and Marion formations, the latter occur- 

 ring next above the Chase stage in Kansas. His statements con- 

 cerning the correlation between the Kansan and Texan formations 

 I understood to be founded upon paleontologic evidence and my 

 remarks were based simply upon an examination of such published 

 evidence. 



In regard to the third point it is true that I understood Dr. Girty's 

 statement in 1905 to refer to the time of the deposition of the Capitan, 

 Kansas deposits, and Permian, but as he now explains it he intended 

 to refer especially to their terminology. So far as terminology is 

 concerned, as I now understand Dr. Girty and the facts, I should 

 say that the term Guadalupian series essentially as Dr. Girty origi- 

 nally proposed it, except that he gave it as ''Guadalupian period,"' 

 would, for the present at least, be used for the Texan deposits. In 

 Kansas the Upper Paleozoic deposits are known under the names of 

 the Big Blue and Cimarron series. If the Big Blue, Cimarron, and 

 Guadalupian series were deposited during Permian time I see no 

 serious objection to putting them in the Permian period or system, 

 recognizing this division as co-ordinate in rank with the Carboniferous 

 and other periods of the Paleozoic in accordance with the usage of 

 the majority of geologists who have carefully considered the classifi- 

 cation of the Upper Paleozoic. Later studies may show more accu- 

 rately the relationship of the Texan and Kansan series and make 

 necessary changes in the local classifications. Dr. Beede has sug- 

 gested the quite different conditions under which these two faunas 

 lived, stating that "one is a cosmopolitan, open-sea, coastal shelf 

 fauna while the other is a more isolated epicontinental sea fauna 

 rather thoroughly separated from its neighbor on the south and per- 

 haps belonging to a different climatic zone.'"' 



The assumptions, in connection with the three points noted above, 

 which appear in the work under discussion, I am not responsible for, 

 and therefore they require no further notice. 



The expression "Kansas 'Permian'" appears very frequently 

 in the Introduction to "The Guadalupian Fauna" and often it 



1 Am. Jour. Sci., 4th ser., Vol. XIV, 1902, p. 368. 



2 Joiir. Geol., Vol. XVII, p. 678. 



