66 Cretaceous. 



Lake, Nebraska, Corhulu inornata, Pholas cuneata, now 3Iartisia cu- 

 neata and Actceon attenuata. 



From (now the Fort Pierre Group) near Fort Clark, Teredo (jlohosa, 

 Helicoceras tortum, now Jleteroceras tortum, TurrilUes cochleatus, 

 no\y Heteroceras coclilealum,, H. tenui.costatum, TarriUtes nmhiUcatus, 

 now //. tunhiUcatum, and Ancijloceras uncum. 



From (now the Fort Benton Group) Fort Benton, on the Upper Mis- 

 souri, /^^oceramMS ^(»^Z^o;?r(^^(s now Volviceramus umbonatas, and from 

 the Black Hills, Scaphites larvo'foi'mis. 



Dr. Leidy described, from the marl of Haddonfield, Camden count}^, 

 New .Terse}', Ilaclrosanrus foiilki. 



F. B. Meek* described, from Vancouver's Island, I^ucula traskana. 

 Area a'quilateralis, A. vancouvercnsis, Cardium scitulum, Phola- 

 domija borealis, P. snbelongata, Trhjonia evansana, IViracia occiden- 

 talis, T. siibtruncata, Dentalium nanaimoense, and Ammonites ramosus. 



Dr. B. F. Shumardf described, from the same island, Inoceramus 

 vancouvercnsis, Pinna calamitoldes, and Ptjrula glabra. 



Prof. E. Emmons;]; -.desc.ribed, from the Greensand of North Carolina, 

 Sphenodus rectidens, and Belemnitella compressa. 



Prof Oswald Hecr,§ of Zurich, Switzerland, described, from Ne- 

 braska, Llriodendi on meeki, Sap)otacitex haijdeni, Leguminosltes mar- 

 coicanus, now Bumelia onarcouana, Populus cyclopJiylla, now Cissites 

 cycloj^hylla, PhylUtes obcordatus, and P. obfusilobatus. 



In 1859, Prof Henrj- Y. Hind|| found the Cretaceous rocks in posi- 

 tion on the Little Souris River, in longitude 100° 30' W., and on the 

 South Branch of the Snskatchewan, in longitude 106° 35' W., and be- 

 tween these widely separated points in many places onthe Assinibolne, 

 the Qu'Appelle, and their affluents. Fifteen miles from the mouth of 

 the Little Souris, the rocks consist of a very fissile, dark blue argilla- 

 ceous shale, holding numerous concretions, containing a large per cent, 

 age of iron. This exposure is 70 feet thick, and the layers are per- 

 fectl}^ horizontal. The whole is supposed to be of the age of the Fort 

 Pierre Group. The Cretaceous of this latitude appears to repose 

 directly upon the Devonian, as the former is found undisturbed and 

 nearly horizontal at altitudes from 400 to 600 feet above exposures of 

 Devonian age, recognized in, situ 30 miles to the east. 



Prof F. B. Meek^ described, from the Little Souris River, Anomia 

 fiemingi, Inoceramus canadensis, Leda hindi, now Nucalana. hindi, and 



■■'■ Trans. Alb. Inst., vol. 4. t Trans- St. Louis Acad. Sci., vol. 1. 



X Geo. Sur. N. Carolina. I Proc Acad. Nat. Sci. 



II Assiniboine and Saskatchewan Expl- Expcd. 



H Rep. on Assiniboine and Saskatchewan Expl. Exped. 



