REPORT ON IWL EONTOLOOICAL COM 

 Spirifer , undt. sp., No. 364 Above medium I 



Aviculopecten Utahensis, Meek, No. 359 Summit Sprite.:: latitude.".!* ;»:'.': longitude 115" 



12'. Yellow-limestone serifs, Cpper Carbon if 



Aviculopecten, undt. sp. (fragments), No. 2-13 Large, regularly and distinctly plicated: plica- 

 tions simple, angular, and crossed by regular, 

 distinct, concentric marks. Mast side of Long 



Myalinn , undt. sp Specimens imperfect. (Irassliopper Creek, East- 

 ern Kansas. Coal-Measures. 



AUonsma Grasshopper Greek, and 2\ miles west of clear 



Creek, Kansas. Coal-Meatum. 



GASTEROPODA. 



Jirllcrophon . undt. sp. (casts) Two and a half miles west of Clear Creek, Kan. 



sas. Coal-Measures. 



CEPHALOPODA. 



Nautilus , undt. sp., No. 201 Small, subdiscoidal j whorls somewhat embrac- 

 ing, rounded on the dorsum, and subangular 

 around the middle of each side, increasing 

 gradually in size. West of Camp Floyd; lati- 

 tude 40° 13'; longitude 112° 10'. In dark lime- 

 stone. Lower Carboniferous. 



Nautilus , (undt. fragments), No. 359 Rather large, discoidal; volutions Bnbquadran- 



gular, and but slightly embracing. Yellow 

 impure limestone, at Summit Spring; latitude 

 115° 12'. I pp< r < 'a rbon if 



Orthoceras baculum, Meek Bast side of Ruby Valley. 



PERMIAN FORMS?.* 



PhifUo 1 ,ora?,'So.U5 • Specimen silicitied. and not 



determined without doubt. 

 latitude 40° 35'; longitude 





'There is such a mingling of Permian and Coal-Mea>ni 

 in Kansas an.l some other portions of the West, that it is 



obtained from beds below the horizon at which thi " 



Cottonwood Creek, north side of Kansas Kiver, 

 Eastern Kansas, in yellow, impure magnesian 



.• thi.-UL. 



i,- .;-,-'■•: ■..--.. : 



