NO. 5 CAMBRIAN TRILOBITES 403 



shaly limestones in association with a large Middle Cambrian fauna 

 as follows at locality ii q : 



Micromitra sculptilis (Meek) 



Micromitra (Iphidella) pannula ophirensis (Walcott) 



Obolus mcconnelli pelias (Walcott) 



Obolus rotundatus (Walcott) 



Lingulclla arguta (Walcott) 



Acrothele subsidua (White) 



Acrothele stibsidua Iccvis Walcott 



Acrotreta attenuata Meek 



Acrotrcta ophircnsis Walcott 



Eoorthis remnicha (N. H. Winchell) 



Eoorthis thyone Walcott 



Syntrophia ? imxia Walcott 



Agnostus 3 spp. 



Ptychoparia 



Neolenus inflalus Walcott 



Neolemis intermedins Walcott 



Neolenus superbtis Walcott 



Orria elegans Walcott * 



Formation and locality. — Middle Cambrian: (iiq, 30g) Marjum 

 formation; about 2,300 feet (701 m.) above the Lower Cambrian, 

 and 660 feet (203 m.) below the Upper Cambrian, in the limestone 

 forming ic of the Marjum formation, 2.5 miles (4 km.) east of 

 Antelope Springs, in west face of ridge east of Wheeler Amphi- 

 theater, House Range; also (sx) same locality but slightly lower 

 horizon, id of section; all in Millard County, Utah. 



Genus LISANIA Walcott 



Lisania Walcott, 191 i, Smithsonian .Misc. Coll., Vol. 57, p. 82. (Describes 



genus.) 

 Lisania Walcott, 1913, Research in China, Vol. 3, The Cambrian Faunas of 



China, p. 163. (Describes genus and illustrates genotype.) 



Genotype. — Anomocarella biira Walcott. 



Lisania has hitherto been identified only from China. The new 

 species L. ? breviloha, from the Upper Cambrian of the Appalachian 

 Province of North America and larger than any of the Chinese 

 species, is doubtfully referred to the genus. 



Lisania differs from Pagodia in having a longer eye lobe, narrower 

 free cheeks, flatter frontal margin. Pagodia occurs with the Upper 

 Cambrian fauna, Lisania with the Middle Cambrian fauna. From 

 Chuangia it differs in its narrower frontal border, narrower fixed 

 cheeks and quite unlike associated pygidium. The three genera, 

 Lisania, Pagodia, and Chuangia, all have a strong, nearly smooth 



