112 ANNALS NEW YORK ACADEMY OF SCIENCES 



In an outcrop considerably higher up, stratigraphically. l)iiT ahnost 

 completely covered so that it was somewhat doubtfully in place, two 

 specimens of the following well-known Ouray limestone type were ob- 

 tained : 



Camarotcechia endlichi Meek 



Of the above species, the ones having the widest range are Euomphalus 

 and Spirifer orestes var. wasatcliensis. Euomphalus utaliensis. E. la.vus 

 and E. ophirensis have commonly been described as Mississippi an from 

 their resemblance to the Waverlyan species of the Mississippi Valley. 

 Their association here with a Devonian fauna, and their range practically 

 from the bottom to the top, indicates that they are probably older than 

 Mississippian, though they may have persisted in other sections into the 

 lower part of the Mississippian. It would otherwise be necessary to 

 assume that the Devonian forms had survived till the Mississippian in 

 order to explain this association, but this seem-s hardly warranted from 

 the occurrence of EunelJa linMoeni Hall and Cystodyciia gilherfi Meek 

 which are described elsewhere as coming from the Middle Devonian 

 (Lower Hamilton of Ohio). 



In looking for the equivalent of this fauna in the West, that of the 

 Ouray limestone in western Colorado suggests itself both from its prox- 

 imity and its striking faunal resemblance. Kindle,^^ who has described 

 the Ouray fauna and has done more than anyone else in suggesting a 

 correlation of the western Devonian strata, has the following to say : 



''Camarotcechia endlichi may be considered tbe most characteristic species of 

 the Ouray fauna, for it has been found at practically every outcrop where the 

 fauna has been recognized from northern Colorado to southern New Mexico." 



The occurrence of this widespread species in the central Wasatch has 

 brought the western border line of the Ouray fauna nearly 300 miles 

 west of the western boundary of Colorado, which Kindle believed to mark 

 its western limit. Wliile the outcrop from which the Wasatch repre- 

 sentatives were obtained was poorly exposed and their associates were 

 not discovered, they may nevertheless be present in the Wasatch region, 

 and later search should reveal them. The presence, however, of this 

 most characteristic species is, it would seem, sufficient to indicate the 

 equivalency of the two formations. Moreover, the resemblance of the 

 faunas that were found below the endlichi horizon to the Upper Devonian 

 fauna of Iowa points to an eastern connection rather than one with the 

 Jefferson limestone of the West. 



23 E. M. Kindle: Bull. Am. Pal., Vol. 4, No. 20, p. 20. 1908. 



