226 



CARBONIFEROUS FORMATIONS AND FAUNAS OF COLORADO. 



PKRRY I'AUK. 



Only two coUoctions trom Perry Pai'k lia\o come to hand. One of these was 

 niiulc by Whitman Cross, the othc^r was examined throiitili tiie courte.sy of W. T. Lee. 

 The followini;' table shows tlie distribution and t'auiias by loralities: 



Tahi.k VIII." — Table alioii'inii ilixlrihiiti<m of Missisuppian upecien in the Milhap liiiieslone In Pin-i/ /'(irk. 



BRACHIOPODA. 



Orthothetes inrcqualis 



Spirifer centronatus 



Spirifersp. b 



Spiriferina solidirostris ? 



Sominula subquadrata ? 



Crana>na subelliptica vnr. hardingensis . 



PELECYPODA. 



Myalinaarkansasana? . 

 Streblopterift media 



CKUSTACEA. 



Leperditia sp. 

 Beyricbiasp.. 



2367. 



(?) 



CO 



X 



2389. 



Total. 



CO 



Though all too scanty, the faunal evidence indicates the closest relation as 

 existing between the Perry Park outcrops and those about Garden Park and Canyon. 

 Every species but one of those found at the latter locality appears also at the former. 

 The relation of these faunas with those found at Leadville and the other Colorado 

 areas will be discussed after considering the last somewhat peculiar collection of 

 Mississippian forms. 



LARIMER COUNTY. 



This fauna is based upon impressions made from casts of shells contained in 

 some pebbles in the conglomerate' occurring 32 miles west and 18 miles north of 

 Greelej', Colo. The collection was made by Prof. L. C. Wooster some time prior to 

 July, 1880. The locality (station 2364) is in Larimer County, east of the Front 

 Range, apparently near the point at which the Cache la Poudre River debouches 

 from the mountains, or possibh' somewhat north of that stream. The horizon is 

 probably that of the Red Beds. Among the impressions obtained in the manner 

 described is that upon which White based the species Euinetria woosteri. Associ- 



a For a description of the localities indicated by number in this table see locality register, pp. 519-532. 



6 Cannon, writing in 1S92 (Colorado Sci. Soc, Proc, vol. 4, pp. 224-234), describes the occurrence of Carboniferous 

 fossils in loose chert bowlders widely distributed along the Front Range. The character of the rock and the circumstance 

 that no fossiliferous Carboniferous strata, except the Millsap limestone, are known along the eastern flank of the range, 

 save in the Sangrede Cristo Mountains and near the Wyoming line, make it probable that this formation was their source. 

 The occurrence in this case is similar to that which furnished the fossils described by White, except that the latter were 

 found in an ancient conglomerate and these in recent gravels, which, however, may possibly be partially formed from the 

 destruction of the conglomerate. 



