334 



E. M. KINDLE RECONiS[AISSANCE OF PORCUPINE VALLEY 



In the Upper Eamparts, some 40 miles east of the lower stations just 

 described, a belt of Carboniferous rocks occurs holding a fauna which 

 Girty considers to represent a later fauna than that found lower dowJi 

 the river. His report on this fauna follows : 



"This fauna, as befoi-e noted, presents a different facies from that just 

 listed; but while I hare compared many of its species with the Gschelian 

 fauna, it presents a decidedly dilfereut aspect from the Nation River material 

 of the Yukon section which I have called Gschelian. On the paleontologic evi- 

 dence I would regard this fauna, at least the characteristic lots, such as .39A, 

 as Upper Carboniferous and younger than the other group of Porcupine locali- 

 ties. It recalls to some extent the earlier Upper Carboniferous faunas of the 

 New Mexico section, but whether a correlation would be justified upon the 

 broader grounds of more extensive collections aud more detailed comparisons 

 I am not prepared to surmise. The lithologic and stratigraphic evidence it 

 appears tends to place at about the same horizon the strata which furnished 

 these two groups of collections, but at present the faunal difference seems to 

 be such that the course either of uniting or of separating them should not be 

 taken unreservedly. The following lists show the species discriminated in the 

 collections to which these remarks apply : 



Stations in the Upper Ramparts of the Porcupine 



No. 34 : 



Fenestella sp. 

 Stenopora sp. 

 Berhya ? sp. 

 Pi'oductus aff. 



gruenewaldti Krotow. 



Productus aff. popei Shumard. 

 Productus aff. semireticalatus Martin. 



No. 35A : 

 Productus afC. cora D'Orbigny. 



No. 35C : 

 Clysiophylliim sp. 

 Pi'oductus aff. timanicus Stuckenberg. 



No. 36 : 



Sponge. 



Crinoidal fragments. 



Chonetes aff. permianus Shumard. 



Productus aff. aagardi Toula (not the 

 same as at Nation river). 



Productus aff. timanicus Stuck. 



Marginifera aff. tvaiashensis Nor- 

 wood and Pratten. 



Productus aff. punctatus Martin. 

 Spirifer sp. 

 Rhynchonella sp. 

 Aviculipecten sp. 



Productus aff. tartaricus Tscherny, 2 

 spp. 



Spirifer sp. 

 Parallelogoceras ? sp. 



Spirifer aff. rectangulus Kut. 

 Squaniularia aff. guadalupensis Shu- 

 mard. 

 Amboccelia n. sp. 



Pugnax aff. rockymontanus Marcou. 

 Aviculipecten sp. 

 Conularia sp. 

 Pleurotomaria, 2 spp. 

 Euphemus aff. car'bonarius Cox. 



