126 KANSAS UNIVERSITY SCIENCE BULLETIN. 



"Prof. A. Hyatt has published a figure of Phacoceras dum- 

 blei. This fossil was taken from the very top of the Albany 

 division in Texas. It was also found at Fort Riley, in Kan- 

 sas ; and as the form is supposed to have but a short range 

 in time, it would go far to assist in correlating the strata." 



In the light of later work by Adams, to be referred to below, 

 the statement made on page 223 of this paper is of extreme 

 interest; the italics are mine : "North of the Brazos river 

 the Wichita division of the Permian rests directly on the 

 Cisco division of the Coal Measures. In a word, it occupies 

 the same position, stratigraphically, as the Albany division 

 on the south. It may be that the W>chita and Albany divisions 

 a'X but different fades of the same formation. The question will 

 have to be determined by a close study of the stratigraphy." 



"If it shall be finally determined that the Wich/da and 

 Albany divisions are but different fades of the same formation, it 

 will at once settle the question of boundary between the Carbonifer- 

 ous and Permian in North Ame-ica, for there is no dispute, about 

 the Wic'ita beds being Permian.^' 



He also states that the fossil flora from the Permian de- 

 scribed by Profs. I. C. White and Fontaine were taken from the 

 Wichita division, and that "the flora collected bears out the 

 conclusion that has been so far clearly shown by the vertebrate 

 and invertebrate fossils, that the strata from which it was 

 taken are Permian." He then discusses the Clear Fork di- 

 vision, and states that it probably extends north into Kansas. 

 He then takes up the discussion of the Double Mountain beds. 

 Concerning the age of these, the gypsum-bearing beds, he 

 says: "During the past season's field-work I have traveled 

 across the Permian area twice, and have collections of fossils 

 from several localities in both the Clear Fork and Double 

 Mountain divisions. I have found no fossils higher than the 

 locality already mentioned as the falls of Salt Croton creek, 

 which is within less than 300 feet of the top of the division. 

 As a necessary result, if the beds at the falls on Salt Croton 

 creek can be shown to be Permian, then there can be no dis- 

 pute as to the beds situated between that and the Wichita 

 being Permian also." 



The fossils found by him in the Double Mountain beds are 



