G. H. Girty — Uyver Permian in Western Texas. 367 



Permian" below, but which is in this instance doubtfully 

 identified. 



From the "dark Permian," some of it in place, but most 

 from float pieces probably belonging to that horizon, were 

 obtained the following species : 



Fusulina elongata Shum. 



Sponges (of several types) 



Lophophyllum (2 sp.) 



Striatopora? sp. 



Acanthocladia sp. 



Fistuliporoid Bryozoa of Mesozoic types 



Crania ? sp. 



Streptorhynchus ? sp. 



Derbya sp. 



Chonetes Permiana Shum. 



Chonetes n. sp. 



Productus Popei Shum. 



Productus Popei var. 



Productus semireticulatus var. 



Productus, semireticulatus type (5 sp.) 



Productus cf. Xorwoodi Swal. 



Spirifer sulcifer Shum. ? 



Squamularia ? Guadalupensis Shum. ? 



Spiriferina Billingsi Shum. 



Hustedia ? papillata Shum. 



•Hustedia? (2 sp.) 



Pugnax ? bisulcata Shum. 



Pugnax? u. sp. 



Pugnax Swallowiaua Shum. 



Camarotoechia indentata Shum. 



Camarotoechia sp. 



Dielasma perinflatum Shum. ? 



Dielasma cf. truncatum Waagen 



Aviculopecten sp. 



Myalina? near squamosa Sow. 



Euomphalus n. sp. 



Bairdia sp. 



Phillipsia perannulata Shum. 



This fauna requires little comment. Its relation to that of 

 the "white Permian," nearly a thousand feet above, is obvious, 

 yet each has an individual facies. In this fauna Phillipsia 

 jperannidata is abundant, and also the curious small fistuli- 

 poroids to which attention has already been directed. The 

 Producti are for the most part of the semiretic%datns type, 

 small, and characterized by strong curvature and a deep 

 median sinus. 



