CA RB OX/FER O US A ND PERM I A N FORMA T/ONS 1 6 5 



Productiis semircticidatis (Mart.) de Kon. (?). Imperfectly preserved (rr). 



SpiHferina kenticckensis Shum. (rr). 



Fistulipora nodulifera Meek (rr). 



Fusulina cylindrica Fischer (r). 



Zeacrinus (?) mucrospiniis McChesney (rr). 



ArchcEOcidaris sp. Spines (rr). 



Crinoids. Large column (rr). 



Fig. 2. View in western part of Green quarry north of Platte River at Louisville, 

 showing line of unconfonnability between Dakota sandstone and Carboniferous lime- 

 stone. The hammer marks the limestone, No. 3 of section, on which the Dakota sand- 

 stone rests, and only three feet to the west, marked by the pick, the limestone is want- 

 ing and the Dakota rests on shales of No. 2. 



The shaly layers of No. 9 did not furnish as large a number 

 of species as No. 2, though the first two species of the follow- 

 ing list were more abundant in the upper than in the lower lime- 

 stone. The fauna is : 



Athyris iSemiiiiilir) subtilita (Hall) NeA'b. (aS 

 Prodnctm ioiis^ispimts Sowb. (c). 



