LIAS IX CALIFORNIA. NEVADA AND OREGON. 401 



I therefore propose for this pecuhar form the name of Arniocnas woodhulli.^ These 

 facts all tend to the conclusion that the lower Lias, having certain forms of undeni- 

 able European facies, occurs in western and s(juth western Nevada and perhaps in 

 California east of the crests of the Sierra." 



These conclusions have been confirmed not only by the above but 

 also by the following facts : 



Through the kindness of Mr J. S. Diller I received from Professor 

 Thomas Condon, of the State Universitv, Eugene City, Oregon, a small 

 collection of fossils of great interest. These specimens are labeled as 

 having been collected by Professor Condon on Beaver creek, a tributar}" 

 of Crooked river, in. the Blue mountains of eastern Oregon. They show 

 that the fauna of the Hardgrave sandstone occurs at this locality. 



The matrix is red sandstone similar to the rock at Taylorville. The 

 close affinity and probable identity of Pholadomya nevadana, Gab.b, from 

 Beaver creek and what has been hitherto named P. kingi, Meek ; the 

 identity of PJioladomya midt'dlneata in this locality and near Volcano, 

 and, finally, tlie citation Ij}- Gabb of the occurrence of Pecten ocutipUcatus, 

 an almost unmistakable form, at this last named place shows that the 

 Hardgrave sandstone or upper I^ias exists at these widely separated 

 localities to the east of the Sierra Nevada, as well as at Taylorville, on 

 the western slope of this range. Gabb, in the same publication, describes 

 and figures as from this locality Turbo regius,'] Turbo elevatus, Pholadomya 

 miUtilineata,^ Pholadomya nevadana, Goniomya aperta, Cardium arceejormis^ 

 Astarte appressa, Piicatula perimbiicata,^ as new species allied to Jurassic 

 forms. The Ammonitina> sliow that the lower Lias certainly exists at 

 this locality near Walkers lake, in southwestern Nevada, and that it 

 probably runs from thence southward into Inyo county and northward 

 into the southern part of Humboldt county, as stated above. It seems 

 highly probal)le also that the Hardgrave fauna exists in Esmeralda 

 county, Nevada, thirty miles southeast of Walkers lake, in close conjunc- 

 tion with the lower Lias, and at Beaver creek in the Blue n^ountains of 

 eastern Oregon, and it is obvious that there was no barrier between these 

 three littoral faunas at the time of the deposition of the upper Lias of 

 Taylorville and that these three basins were contemporaneous and 

 connected. 



I have not been able to add anything in this paper witli regard to the 

 middle Jura or Oolites beyond what has been given in the paper quoted 

 above. I 



*The type is in the collection of the State Mining Bureau, San Francisco, number 7642, Inyo 

 county, California, collected by D. S. Woodhull. 



t The types of those marked with a star have been found in the Whitney collection, Museum of 

 Comparative Zoology. See Am. Jour. Conch., 1869. 



JJura and Trias at Taylorville, California, p. 410. 



