1^0. 1.] PEALE O^ JUEA-TEIAS OF IDAHO AND WYOMING. 121 



From Ko. 5 I obtained : 



Belemnites densus. 

 Avicnlopecten idalioensis f 

 Gryphcca sp. "? 

 Undetermmed bivalves. 



4.t no one point was the entire section, as given above, exposed. The 

 evidence for tbe section is as follows : 



JSTos. 1 and 2 were determined by the section at and near Station 66, 

 south of John Gray's Lake (section at locality Ko. 1 in Dr. White's 

 paper). 



'Near Station 56 in the Salt Eiver Eange, about 28 miles east of Sta- 

 tion 66, beds lithologically similar to those of ISTo. 2 in the general section 

 just given, and containing Avicidopecten pealei and GervilUa, were seen 

 in position above limestones similar to those of l^o. 1, which here con- 

 tained quantities of Froductus muUistriatus. On this ground I have 

 referred No. 1 to the Carboniferous. 



Above the arenaceous and calcareous bed (which correspond litho- 

 logically and ijaleontologically with Ko. 2 of the section) in the Salt Eiver 

 Eange are the red sandstones (Fo. 3). They are also i)robably in x)lace 

 above the section of Station 66, as is evident from the following : 



Descending the ridge leading southwest from Station 66, southwest- 

 erly dips are noted in the strata last seen (the upper ones of section at 

 locality l^o. 1, White's paper). After passing through the timber, which 

 conceals the remainder of the section, we come to red sandstones, in all 

 respects like those of the Salt Eiver Eange, having a northeasterly dip. 

 We have therefore crossed a synclinal. 



These facts, therefore, appear to justify me in connecting the sec- 

 tions. 



Nos. 4 and 5 are determined by sections made in John Day's Valley, 

 where they rest conformably on the "Eed Beds." The entire section is 

 conformable. Above the " Belemnites Beds " is a quartzite followed by a 

 series of shales and sandstones several thousand feet in thickness, which 

 has been referred to the Cretaceous. 



It is not my intention to enter into any paleontological discussion ; but 

 there are some points based on the i^aleontological contents of the sec- 

 tion to which I wish to refer briefly. 



Pentacrinus asteriscus was found at a number of localities, other than 

 those of the section, throughout the district, and always in beds above 

 the horizon of the Eed Beds. The following were the associated fossils 

 identified by Dr. White : 



Gamptonectes hellistriatus. 

 Ostrea strigulecula. 

 Trigonia sp. ? 

 Tancredia sp. ? 

 Modiola sp. ? 



