120 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Hypopn^tus squaliceps, Zatrarhys microthalam^is , Z. conchigerus, 

 Trimerorhachis mesops, Diplocavlus limbatus, Octocoelus testudi- 

 neus, 0. mimeticus , Conodectes favosus, Diadectes bicidminatus , 

 Bolbodon tenuitectus, Pnriotdchus aduncus, Labidosaurus hamatus, 

 Trimerorhachis conangulus, Pariotichus (Ectocynodon) incisi- 

 vus, Helodectes isaaci, Platysomus palmaris, Ctenacanthus am- 

 blyx'phias, Janassa ordiana, Dimetrodon semiradicatus^ Naosaurus 

 claviger. 



Aside from Cope's "Contributions," Cummins quotes a 

 statement of his" concerning the age of the beds he refers to 

 the Permian, which is as follows: "The Texan genera of 

 this group, so far as known, are equally related to the Ural 

 and South African types. The age of the former deposit is 

 the Permian, which includes, according to Murchison, the 

 Rodthliegende and Zechstein of Thuringia. The age of the 

 South African beds is uncertain, but it is suspected by some 

 authors to be Triassic, and by Owen to be Paleozoic. In 

 discussing the age of the Clepsydrops shales of Illinois, which 

 had been referred to the Coal Measures by all previous in- 

 vestigators, I left the question open as to whether they should 

 be referred to the Permian or Triassic formations. The evi- 

 dence now adduced is sufficient to assign the formation, as 

 represented in Illinois and Texas, to the Permian. Besides 

 the saurian genera, above mentioned, the existence of the 

 ichthyic genera Janas.sa, Ctenodus and Diplodus in both locali- 

 ties renders this course necessary." 



In the February number of the American Naturalist for 

 1889,^^ Prof. Charles A. White described the first invertebrates 

 from the Red Beds of Texas. The fossils were from the same 

 horizon as the vertebrates described by Cope, above men- 

 tioned. Specimens were first submitted to White by Prof. 

 W. F. Cummins, who did much of the collecting for Cope. 

 White then visited the localities from which the specimens 

 came and, with Cummins, made further collections. He also 

 studied the'stratigraphy of the region and published the sec- 

 tion made by Cummins, and verified by himself, of the rocks 

 of the region in which the fossils were found. On page 113 



14. Gaol. Surv. Tex., II, p. 414. 



15. XXIII, pp. 109-128. 



