128 Cretaceous. 



E. P. Whitfield* described, from tiie Juditli River Group, at the 

 mouth of Judith river, Tapes montanensis, Mactra 7naia^ Sanguino- 

 laria oblata^ and Thracia grinnelU. 



W. M. Gabbf described, from the Cretaceous of New Jersey, Penta- 

 crinus hryani, Goniaster maynmillata, Scalpellum conradi, Nautilus 

 hryani^ Bwcula strigosa, Opalia thomasi^ 0. cyclostoma, Laxispira 

 lumbricalis, Ostrea bryani, Paliurus triangularis ; from the Ripley 

 Group, of North Cai'olina, Exilifusus kerri, Fasciolaria Icerri^ F. 

 obliquicostata, • Gyrotropls squamosus, Ataphrus kerri, Idonearca 

 carolinensis ; fi'om Patula creek, Georgia, Drillia georgiana, Trito- 

 nium edentatara, Nassa globosa, Fasciolaria crassicosta, Ptychosyca 

 inornata, Aporrhais bicarinata, Bivonia cretacea, Pholadomya 

 littlei, Schizodesma appressa, Telliaa georgiana, Gari elliptica, 

 Peronoioderma georgiana, Trigonia angulicosta, Idonearca littlei, 

 Trigonarca cuneata, Ostrea littlei, 0. exogyrella ; and from Alabama, 

 Idonearca alabamensis, and JSfeithea complexicosta. 



J. W". Spencer;|; examined the country between the Upper Assine- 

 boine river and lakes Winnipegosis and Manitoba, and found rocks of 

 Cretaceous age on Thunder Hill, at a height of nearly 800 feet above 

 Swan lake. Following the course of Swan river below Thunder Hill, 

 there are numerous ekposures of these rocks for about thirty miles, 

 which, with those of Thunder Hill, furnish a thickness of from 550 to 

 650 feet. There are also numerous exposures along the Bell riA^er in 

 the Porcupine mountains. The}'^ repose on rocks of Devonian age. 

 Mr. G. M. Dawson, from the calcareous character, the microscopic 

 forms, and the presence of Inoceramus and Ostrea congesta, referred 

 the rocks to the Niobrara Group. 



Prof. J. F. Whiteavesg described, from the Cretaceous of the Queen 

 Charlotte Islands, Ammonites perezianus, A. logananus, A. richardsoni, 

 A. skidegatensis, A. carlottensis, A. laperonsianus, A. filicinctus, A. 

 crenocostatus, Amauropsis tenuistriata, Pleurotomaria skidegatensis, 

 3Iartesia carinifera, Pleu.romya carlottensis, Pholadomya ovuloides, 

 CalUsta subtrigona, Trigonia diversicostata, lleleagrina amygda- 

 loidea, and Syncjiclonema meekannm. 



Prof. E. D. Cope|| described, from the Judith River Group of Montana, 

 Auhlysodoa lateralis, Lcvlaps incrassatus, L. explanatus, L. falculus, 



* Carroll to Yellow Stone Nat. Park, 

 t Proc. Acad. Nat. Sci. 



I Geo, Sur. of Canada, 1876. 

 § Mesozoic Foss., Pt. 1. 



II Proc. Acad. Nat. Sci. 



