358 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 5/ 



Fauna of Eau Claire formation. — The fauna of the Eau Claire 

 sandstones is marked especially by Anomocarella zvoostcri, Crepi- 

 cephalus texanus, and Crepicephalus ioivensis. 



The fauna includes near Eau Claire, Wisconsin, the following 

 species at the highest horizon on Mount Washington, locality 78a : 



Oboliis sp. undt. Pagodia thea (Walcott) 



Diccllomiis pectenoides (Whitfield) Crepicephalus iozvciisis Owen 



Dicellomns politus (Hall) 



At a slightly lower horizon the following species occur, locality 

 gSx: 



Worm borings Ptychoparia chippcwaensis Owen 



Obolus matinalis (Hall) ' Ptychoparia optata Hall 



Lingulella mosia (Hall) Crepicephalus iowensis Owen 



Lingulclla phaon (Walcott) Crepicephalus texauus Shumard 



Dicellomus politus (Hall) Agraulos sp. undt. 



Hyolithes primordialis Hall Pagodia thea (Walcott) 



Stenotheca sp. undt. Anovwcare sp. undt. 



Agnosius josepha Hall Anomocarella onusta (Whitfield) 

 Ptychoparia ? calymenoides Whitfield Anomocarella woosteri (Whitfield) 



Additional species occur at other localities as follows : 



Obolus mickivitci Walcott Billiiigsella coloradoeiisis (Shumard) 



Obolus namouna Walcott Pcmphigaspis bullata Hall 



Obolus rhea Walcott Lonchocephalus ? minor (Shumard) 



Obolus (Westonia) aurora (Hall) Ptychoparia ? quadrata (Whitfield) 



Lingulella winona (Hall) Anomocarella ? winona (Hall) 



Lingulella winona convexa (Walcott) 

 Lingulella (Lingulepis) acuminata 

 (Conrad) 



Pcmphigaspis bullata seems to be confined to the uppermost beds 

 referred to the formation. 



Stratigraphic range of the genera. — From the preceding lists it will 

 be seen that with our present information the genera of the Dikelo- 

 cephalinse in the central region of the continent range from the sand- 



Conocephalites anatinus Hall Conoccphalites perseus Hall 



Conocephalitcs eryon Hall Ptychoparia patersoni (Hall) 



Conocephalites nasutus Hall Arioncllus bipunctatiis Shumard ? 

 Conocephalitcs oiveni Hall 



[All described in Sixteenth Ann. Rept. N. Y. State Cab. Nat. Hist., 1863.] 

 That from the Upper Cambrian of Texas is : 

 Ptychoparia llauocnsis Walcott 



[Described in Proc. U. S. Nat. Mus.. Vol. 13, 1890, pp. 272-274.] 



