34 Cincinnati Society of Natural History. 



Prof. C. A. White,* from the Jurassic south of Dirty Devil riA'er, 

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

 ceramus crassalatus ; and from Camp Cottonwood, Old Mormon Eoad, 

 Nevada, Myoplioria ambilineata. 



F. B. Meek,f from the Jurassic at New Pass, Desatoya Mountains, 

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

 kingi, Cucidlcea hac/uei, Myacites inconspicuus, Myacites weberensis^ 

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

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

 chonella myrina, Lima occidentalis, from Chalk Creek, Astarte arenosa, 

 from Shoshone Springs, Augusta Mountains, Nevada, Terebratula 

 angusta, Aviciilopecten augustensis, Septocardia typica^ S. carditoidea., 

 from Wyoming Nation lelia, Camptonectes pertenuistriatus, Trigonia 

 quadrangulari s . 



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 bj- 

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

 arasaurus supremiis, Comj)semys pUcatulus,^ Caulodon diversidens, 

 Tichosteus lucasanus, Amjihicoelias alti(s,\\ A. latus, Sym2)7iyro2Jhiis 

 musculosus,^ Caulodon leptogamus, Lmlaps trihedrodon.** 



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

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

 Atlantosaiirus montayius, Apatosaurus ajax, A. grandis, Allosaurus 

 fragilis, Nanosaurus rex. 



In 187S, J. F. WhiteavesJJ pointed out the Jurassic Age of certain 

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

 Pinna subcancellata^ Grammatodon iltasyoucoensis and Trigonia 

 dawsoni. 



Prof. E. D. Cope, from near Canyon City, Colorado,§§ Hypsirophus 

 discurus, Brachyrophus altarkansanus., AinjJhicotylus lucasi, Tichos- 

 teus (equifacies, and Epihanterias amplexus.\\ 



Prof. O. 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. 



I Pal. Bui., No. 25. § /&«cJ., No. 26. 1| Ibid., No. 27. H Ibid., No. 28. 

 *- Bull. U. S. Geo. Sur. Terr., No. 3. 

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

 UGeo. Sur. Can. 



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

 TfH Am. Jour. Sci. & Arts, 3d ser., vol. 15 and 16. 



