GEOL.-VOL. I.] SMITH-COMPARATIVE STRATIGRAPHY. 355 



Many of the commonest species in the Middle Trias of 

 the West Humboldt Range appear to be most closely 

 related to forms in the zone of Ceratites trtnodosus of the 

 Mediterranean region, as Ceratites conf. trinodosus Moj- 

 sisovics, Ceratites conf. planus Arthaber, and Ceratites 

 conf. altecostatus Arthaber. 



It is therefore likely that not only the lower Ladinic, 

 but also the upper Anisic stage is represented in the 

 Daonella beds of Nevada. 



The writer has recently (May 1902 and July 1903) visited 

 the West Humboldt Range in the study of Triassic stratig- 

 raphy, and has made extensive collections, especially in the 

 Middle Trias. 



The fossils of the Middle Trias were all found in lime- 

 stone No. I of the Survey of the Fortieth Parallel; the 

 fossiliferous beds are not more than two hundred feet thick, 

 and lie near the base of this division. 



In Buena Vista Canon, near Unionville, were found: 



Gymnotoceras blakei Gabb Ptychites ? perplanus Meek 



Beyrichites rotelliformis Meek Dhiarites sp. nov. 



Acrochordiceras hyatti Meek Balatonites sp. nov. 



In Cottonwood Canon, near the " Lucky Dog " Mine, 

 were found : 



Daonella dubia Gabb Acrochordiceras hyatti Meek 



Daonella afF. lommeli Wissmann Beyrichites rotelliformis Meek 



Orthoceras blakei Gabb Ptychites ? perplanus Meek 



Eudiscoceras gabbi Meek Arcestes gabbi Meek 



Anolcites nieefii Mojsisovics Atractites sp. nov. 



Anolcites whitneyi Gabb Celtites Haiti Mojsisovics 



Gymnotoceras blakei Gabb Japonites sp. indet. 



Ceratites conf. trinodosus Mojsisovics Encrinus stems 

 Longobardites sp. nov. 

 Saurian bones and teeth, probably referable to Cymbospondylus Leidy. 



A new locality was found by the writer on the divide 

 between the south fork of American Canon and Troy Canon, 

 four miles south of Foltz Post-Office. At txiis locality 



