168 Cincinnati Society of Natural History. 



Prof. E. D. Cope* described, from Solomon river, Kansas, Portheus 

 gladius^ now Pelecopterus gladius^ and Portheus lestrio. 



Prof. O. C. Marshf described, from Kansas, Aj^atornis celer. 



Dr. Joseph Leid}' J described, from Smoky Hill river, Kansas, CU- 

 dastes affinis; and from Columbus, Mississippi, Eumylodus 

 laqueatus. 



Mr. James Richardson§ separated the Cretaceous rocks of Vancou- 

 ver Island into seven divisions in ascending order as follows : 



A. Productive coal measures. 



B. Lower shales. 



C. Lower conglomerate. 



D. Middle shales. 



E. Middle conglomerate. 



F. Upper shales. 



G. Upper conglomerate. 



A section of division A., on Brown's river, is shown to be 739^ feet 

 thick. Division B., on Sable river and Denman Island, 1,000 feet. 

 Division C, on Denrnan and Hornby Islands, between 900 and 1,000 

 feet. Division D, on Hornby Island, 70 feet. Division E., on Hornby 

 Island, from 1,100 to 1,200 feet. Division F., near Tribune Ba}', 776i^ 

 feet. And Division G., on Tribune Bay, 320 feet. Making a total 

 thickness of 5,000 feet. 



Dr. Dawson II described, from the Lower Cretaceous of Queen 

 Charlotte Islands, Cycadeocarpus columbianus. 



In 1874, Dr. F. Y. Haj^den^ said, that to one who has carefully stud- 

 ied the divisions along the Missouri river, the Cretaceous beds in Colo- 

 rado and New Mexico, ma}' be separated into five groups, without 

 much difficult5^ The Dakota group is well shown and is always char- 

 acteristic, though seldom containing an}' organic remains. The Niobrara 

 group is represented b}' a thin bed of impure gra}^ limestone, and thin 

 calcareous shale, with Ostrea congesta and a species of Inoceramics. The 

 fossils are about the same as those occurring on the Missouri, but the 

 rocks have little of the chalky texture, as observed in the northwest 

 and in Kansas. The Fort Benton and Fort Pierre groups are black 

 shaly clays, and do not differ materially from the same groups occurr- 



* Proc. Acad. Nat. Sci. 



t Am. Jour. Sci. and Arts, 3d series, vol. 5. 



J Cont. to Extinct V^ert. Fauna. W. Terr. 



§ Geo. Sur. Can. 



II Geo. Sur. Can. 



IF Ann. Rep. U. S. Geo. Sur. Terr. 



