368 G. H. Girty — Upper Permian in Western Texas. 



The fauna of the yellow sandstone I will only hastily refer 

 to. It contains Fusulina elongate Shumard and some brachio- 

 pods, chiefly Prodiicti of somewhat different types from those 

 above. The major portion of the fauna consists of pelecypods, 

 many of which are different from those of the limestone, and 

 are new species. 



The black limestone at the base of the section is sparingly 

 fossiliferous. A number of species were obtained, however, 

 about 18 in all. This fauna is related to those above, espe- 

 cially to that of the " white Permian," and it also includes a 

 species of Bichthofenia. 



These faunas are clearly pre-Mesozoic, though containing 

 certain obvious Mesozoic relations. They are also different 

 from any American faunas yet known, and are more especially 

 related to the late Paleozoic faunas of Asia. Among related 

 faunas may be mentioned that of China, described by Pichtho- 

 fen,* that of India, described by Waagen,f that of the Carnic 

 Alps, described by Schellwien, J and, samewhat more remotely, 

 that of the Palermo province, described by Gemmellaro,§ and 

 the Permian of England, described by King.] 



]^ot only are these faunas very different from any known in 

 America elsewhere, but they give evidence of being later in 

 geologic time. For this reason I propose to give them a 

 regional name which shall be employed in a force similar to 

 Mississipp'ian and Pennsylvanian. For this none more appro- 

 priate than one derived from the locality where they were first 

 discovered can be found, and the term Guadalupian is sug- 

 gested. The stratigraphic limits of the Guadalupian period 

 will have to be determined on intrinsic evidence. Kt present 

 it seei^is to include the whole section at the southern end of 

 the Guadalupe Mountains, but the central fauna will be that 

 of the " white " and " dark Permian " as described by Shumard. 



I plan to resume field work in this region during the season 

 of 1902, and hope to make important additions to the Guad- 

 alupian fauna, and to discover its relations with those which 

 preceded and those which followed it. It is my purpose to 

 more fully study and to describe this interesting fauna at an 

 early opportunity. 



Washington, D. C. 



* China, Richthof en, vol. iv, Berlin, 1883. 



f Geol. Surv. India, Palasontologia Indica, Salt Range Fossils, vol. i, 1887. 

 X Die Fauna der Trog-Kofelschichten, K. K. Geol. Reichsanstalt, Bd. 16, 

 Heft, 1, 1900. 



§ La Fauna dei Calcari con Fusulina, Molluscoidea, Palermo, 1898-99. 

 U Mon. Perm. Foss. England, Paleontograph. Soc, 1850. 



