NO. 24 



PTARMIGAN I A STRATA RESSER 



15 



Locality 19s evidently represents the same faunal zone, and was 

 collected nearby. 



Acrotrcta sulcata Walcott 

 Dolichomctopsis mansficldi, n. sp. 

 Kochiclla mansficldi, n. sp. 

 Lingulella sp. 

 P oulsai ia bearcnsis, n. sp. 



Prior to 1906 several small lots of fossils were received from 

 these beds. They were given the numbers 322 and 322a, and contain 

 Acrotrcta sulcata Walcott and A. cucharis, n. sp. 



Brigham quartzitc: 



Thickness of exposure is not given. Fossils were found 75 feet 

 below the top (loc. 59c). The collection contains fossils in 

 quartzitic sandstone and in crystalline limestone. The field 

 label reads, "75 feet below the top of the quartzite and 125 feet 

 below the Spence shale." This shows a discrepancy of nearly 

 20 feet with the measurements given above. 



In quartzitic sandstone : 



Hyolithcs sp. 

 Kochiella arcnosa, n. sp. 

 Ptychoparclla sp. 



In limestone (most of the specimens are too fragmentary to identify 

 specifically) : 



Alokistocare sp. 

 Clavaspidella excavata, n. sp. 

 Ehmaniclla maladcnsis, n. sp. 

 Eocrinus? sp. 

 Glossoplcura (2 species) 

 Iphidclla sp. 



Kootenia libertycnsis, n. sp. 

 Kootenia vemista, n. sp. 

 Micromitra haydcni Walcott 

 Nisusia sp. 

 Zacantlwidcs sp. 



Randolph quadrangle . — The Mill Creek section is in both the 

 Preston and Randolph quadrangles. It is not necessary to reprint 

 Richardson's section, which is based chiefly on the outcrops near 

 Garden City (1913). In fact he does not give a detailed section, for 

 he says : "The Cambrian section in the Randolph quadrangle is essen- 

 tially that described by Walcott as occurring in Blacksmith Fork, 

 Utah, and in the vicinity of Liberty, Idaho, and need not be described 

 here." He then goes on to say that the Cambrian is well exposed 

 west of Garden City where he measured the section. 



Richardson differentiated the Hodges shale member at the base of 

 the Bloomington. It is described as a persistent zone of drab clay 

 shale 325 to 350 feet thick. 



