176 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



Feet 



ORR FORMATION (continued): 



10 (continued) : 



Fauna : 



Fragments of trilobites. 



lb. Sand}^ and siliceous, bluish and drab-colored shales, with inter- 

 bedded bands of dark, bluish gray limestone 6 inches to 2 

 feet thick 84 



Fauna: 



Section of crinoid column. 



Ungiilella manticida (White) [1874, p. 9]. 



Lingulclla isse (Walcott) [1905, p. 330]. 



Obohis rotiindatus (Walcott) [1898, p. 415]. 



Ptychaspis. 



Anomncare. 



ic. Lead-colored, finely oolitic, and arenaceous limestone in layers 

 4 inches to 2 feet thick that are obscurely banded by thin 

 strips of light and dark gray color 91 



Fauna: 



Fragments of trilobites. 



id. Bluish gray, compact limestone in layers 2 inches to 4 feet thick 



that break down into irregular, thin layers on weathering. .. 115 



Fauna (near base) : 

 Fragments of trilobites. 



Linnarssonclla modesta Walcott [1908^, p. 90]. 

 Linnarssonella nitens Walcott [1908c/, p. 91]. 

 Solenopleura. 



le. Dirty brown and bluish black, arenaceous shales, with thin 

 nodules of gray, fossiliferous limestone in some horizons; 

 also a few layers of bhiish gray limestone 4 inches to 8 

 inches thick 235 



Fauna (near the top) : 

 Linnarssonclla modesta Walcott [i9o8rf, p. 90]. 

 Lingitlella isse (Walcott) [1905, p. 330]. 

 Ptychoparia? 

 Solenopleura. 



Fauna (near the base) : 



Micromifra (Paterina) crcnisiria ? (Walcott) [1897, p. 713]. 



Oholus mcconnelli pelias (Walcott) [1905, p. 330]. 



Lingulella desiderata (Wa'icott) [1898, p. 399]. 



Lingulella isse (Walcott) [1905, p. 330]. 



Linnarsonella transversa Walcott [1908c/, p. 92]. 



Agnostus. 



Crepicephalus. 



2a. Gray, slightly arenaceous limestone in layers 2 to 6 feet thick, 



weathering lead gray. (Clifif- forming beds.) 590 



