108 Cincinnati Society of Natural History. 



Prof. O. C. Marsli"^ described, from Smoky Hill river, in Western 

 Kansas, Pterodactylus occidentalism P. velox, P. ingens, Graculavus 

 anceps, Hesperornis regalis, Lestosaurus simus, now Platecarpus simus^ 

 L. felix., now P. felix, L. latifrons, now P. latifrons-, L. gracilis, 

 now P. gracilis, Rhinosaurus micromus, now Liodon micromus, 

 Edestosaurus rex, now Clidastes rex, Ichthyornis dispar, CoJono- 

 saurus mudgei, now Ichthyornis dispar; and from the greensand at 

 Hornerstown, New Jerse}^, Graculavus velox, Graculavus pumilus, and 

 Palceotrinya vagans. 



Dr. Joseph Leid3'f described, from Texas, Otodus divaricatiis; from 

 Kansas, Oxyrhina extenta; from New Jersey, Acrodus humilis; and 

 from Mississippi, Pycnodusfaha. 



F. B. Meek and J. H. Kloos;J: found the Benton Group underlying 

 the drift gravel and cla}^ in the Sauk valle}^ in Minnesota. 



T. A Conrad§ described, from the Yellow Chalk, near the Saline 

 river, Kansas, Haploscapha grandis, and H. excentrica. 



And Prof Leo. Lesquereux described, from the hard ferruginous 

 sandstone of the Dakota Group, in Kansas, Pterosper mites quadratus, 

 now Pterophyllum quadratum, Pterospermites multinervis, now Ptero- 

 phyllum multinerve, Pterospermites haydeni, now Pterophyllum hay- 

 deni, 3£agnolia ensifolia, now Celastrophyllxim ensifolium, Quercxis 

 mudgei, now Protophyllum mudgei^ Aralia quinquepartita, Platanus 

 heeri, and Sassafras ohtusus^ now Cissites obtusus. From the reddish, 

 ferruginous, hard shale of the Laramie Group, below the Coal at 

 Evanston, Utah, Quercus negundoides, Betula stevensoni, Rhus evansii 

 Juglans rhamnoides; from a grayish, fine-grained, hard shale on the 

 divide between the source of Snake river and the southern shore of 

 Yellowstone lake, Gymnogramma haydeni; and from six miles above 

 Spring canon, and top of hills between Fort Ellis and Botteler's ranch, 

 Colorado, 3Iyrica ambigua, Quercus ellisana, and Q. pealei. 



In 1873, Prof. Leo Lesquereux|| described the Lignitic Group, from 

 the Raton mountains, northward to Denver and Che3'enne, and then 

 along the Union Pacific railroad to Evanston. In passing obliquely 

 from the town of Trinidad to the Raton valle}'', in a northwest direction, 

 the stage-road gentl}^ ascends about 150 feet to a plateau which, at the 

 surface, consists of the black shale of the Fort Pierre Group, and 



* Am. Jour. Sci. and Arts, 3d ser., vol. 3 and 4. 

 t Proc. Acad. Nat. Sci. 

 X Am. Jour Sci. and Arts, 3d ser., vol- 3. 

 I 5th Rep. Hayden's U. S. Geo. Sur. Terr. 

 li Hayden's 6tli Rep. U. S. Geo. Sur. Terr 



