234 Cincinnati Society of Natural History. 



Prof. C. A. White,* from the Jurassic south of Dirt}- Devil river, 

 Utah, Ostrea strigllecula ; from the North Fork of Virgin river, Ino- 

 ceratnus crassalatiis ; and from Camp Cottonwood, Old Mormon Road, 

 Nevada, Jfyophoria amhlllneata. 



F. B. ]Meek,f from the Jurassic at New Pass, Desato^ya Mountains, 

 Nevada, Lima erecta; from the Weber Canon, Wasatch Range, Pinna 

 kinpi, CucuUcea hagicei, 3Iyacites inconspicuus, Myacltes weberensis^ 

 and from Cottonwood Canon, Belemnites nevadaensls. Hall and Whit- 

 field, from the Jurassic at Flaming Gorge, Uinta Range, Utah, lihyn- 

 chonella 7nyrlna, Lima occidentalism from Chalk Creek, Astarte arenosa, 

 from Shoshone Springs, Augusta Mountains, Nevada, Terebratula 

 angusta, Avicidopecten augustensls, Sejytocardla typica, S. carditoidea, 

 from Wyoming Natica lella, Camptonectes loertenulstrlatus, Trlgonia 

 quadrangularls. 



Prof. E. D. Cope first suggested that the rocks at Canyon City, 

 Colorado, supposed by Prof. Hayden to belong to the Dakota Group 

 (and also those in the same horizon, 100 miles north, supposed b^- 

 Prof. Marsh to be lower Cretaceous), are Jurassic, and described J Cam- 

 arasaurus supremtis, Compsemys pllcatulus,^ Caulodon diversidens, 

 Tichosteus lucasanus, AmjyhicosHas alf.iis,\\ A. latus, Symphyroplius 

 muscidosus,^ Caulodon leptogamus, Loilaps trihedrodon.** 



And Prof. O. C. Marshf f described, from the Upper Jurassic rocks 

 on the eastern flank of the Rocky Mountains, Stegosaiirus armatus, 

 Atlantosaurus montanns, Apatosaurus ajax, A. grandis, Allosaurus 

 fragilis, Nanosaurus rex. 



In 1878, J. F. Whiteaves;};;!; pointed out the Jurassic Age of certain 

 rocks exposed on Iltasyouco river, in British Columbia, and described 

 Pinna siibcancellata, Grammatodon iltasyoucoensis and Trlgonia 

 dawso7ii. 



Prof. E. D. Cope, from near Canyon Citj^, Colorado,§| Hypsirophus 

 discurus, Brachyrophus altarkansanus, Amphlcotylus lucasi, Tichos- 

 teus aiqulfacies, and Ejjhanterlas amplexus.\\ 



Prof. 0. C. Marshf ^ described, from the Upper Jurassic of Colo- 

 rado, Atlantosaurus Immanis, Morosaurus Impar, Allosaurus lucaris^ 



-Wheeler's Sur. W. 100th Mer., vol. 4. 



t U. S. Geo. Expl. 40th Parallel. 



t Pal. Bui., No. 25. § Ibid.,^o. 26. || Ibid., No_ 27. H Ibid., No. 28. 

 *••■ Bull. U. S. Geo. Sur. Terr., No. 3. 

 tt Am. Jour. Sci & Arts, 3d ser., vol. 14. 

 U Geo. Sur Can. 



§? Bull U. S. Geo. Sur., vol. 4. No. 1. Ill Am. Nat., vol. 13. 

 HIT Am. Jour. Sei. & Arts, 3d sor., vol. 15 and IG. 



