l8o SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



MARJUM FORMATION (continued): 



If (continued) : Feet 



Fauna (near top) : 



Acroircta pyxidiciila White [1874, p. 9]. 



Agnostus. 



Ptychoparia like P. kiiigi (]\Ieek) [1870, p. 63]. 



Fauna (in central portion, though ranging through 100 to 

 150 feet of the thin-bedded shaly limestone) : 

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

 Lingulella argiita (Walcott) [1898, p. 396]. 

 Acrothele subsidua (White) [1874, P- 6]. 

 Acrotreta ophirensis ? Walcott [1902, p. 591]. 

 Eoorthis thyone Walcott [1908^, p. 105]. 

 Nisiisia (JamcscUa) naiitcs (Walcott) [1905, p. 283]. 

 Nisusia (Jaim-sclla) spciicci (Walcott) [1905, p. 285]. 

 Hyolithcs. 



■ Agnostus (2 species). 

 Ptychoparia (3 species). 

 Solcnopleura. 



Owcnella typa, new genus and new species. 

 Neolenus infiatus Walcott [1908^, p. 30]. 

 Neolenus intermedins Walcott [1908^?, p. 34]. 

 Neolenus intermedins pugio Walcott [1908^, p. 35]. 

 Neolenus supcrhus \\'alcott [1908?^ p. 36]. 

 Ogygopsis? 



id. Gray, shaly limestone, passing below into shales, interbedded in 

 the shaly limestone, and at 75 feet from the top into drab 

 argillaceous shales 105 



Fauna: 



Micromitra (Iphiddla) pannnla n/^hircnsis (Walcott) 



[1905, p. 306]. 

 Mieromitra sciilptilis ]\[eek [1873, p. 479]. 

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

 Obolus rotundatus (Walcott) [1898. p. 415]. 

 Lingulella arguta (Walcott) [1898, p. 396]. 

 Acrotreta attenuata Week [1873, p. 463]. 

 Acrotreta ophirensis Walcott [1902, p. 591]. 

 Acrothele subsidua (White) [1874, p. 6]. 

 Acrothele subsidua Icevis, new variety. 

 Eoorthis remnicha (N. H. Winchell) [1886, p. 317]. 

 Eoorthis thyone Walcott [1908c?, p. 105]. 

 Syntrophia unxia Walcott [^goSd. p. 105]. 

 Agnostus (3 species). 

 Ptychoparia. 



Owcnella typa, new genus and new species. 

 Neolenus infiatus Walcott [1908^', p. 30]. 

 Neolenus intermedins Walcott [19085, p. 34]. 

 Neolenus superbus Walcott [1908/?, p. 36]. 

 Ogygopsis F 



