198 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 53 



Spence shale (continued) : 



I (continued) : 



Neolenus a. 



Neolenus b. 



Bathyurisctis howelli Walcott [1886, p. 216]. 



Batliyuriscus productus (Hall and Whitfield) [1877, p. 



244]. 

 Ogygopsis. 



LANGSTON FORMATION [Walcott, 1908a, p. 8] : 



Peet 



10. Massive bedded, bluish gray limestone, passing downward into 



gray, arenaceous limestone with many round concretions, 



one-fourth to three-fourths of an inch in diameter 64 



Fauna: 



Obolus (Westonia) ella (Hall and Whitfield) [1877, p. 



232]. 

 Zacanthoides sp. 

 Bathyiiriscus productus (Hall and Whitfield) [1877, p. 



244]? 

 Neolenus ? 



lb. Massive bedded, bluish gray limestone that breaks up into lay- 

 ers 2 to 8 inches thick on weathering and with many round 

 concretions 44 



Fauna: 

 Ptychoparia. 



Bathyurisctis productus (Hall and Whitfield) [1877, p. 

 244]. 



In the section two miles southeast of Malade, Idaho, a section 

 which is 60 miles northwest of Blacksmith Fork, the fauna at this 

 horizon is large and finely preserved in compact, bluish gray lime- 

 stones. It includes : 



Micromiira Iiaydeni Walcott [igdSd, p. 55]. 

 Micromitra (IphideUa) pannula (White) [1874, P- 6]. 

 Micromitra {IphideUa) pannula opitirensis (Walcott) 



[1905, p. 306]. 

 Lingulella desiderata (Walcott) [1898, p. 399]. 

 Lingulella helena (Walcott) [1898, p. 406]. 

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

 Acrotrcta idahoensis sulcata Walcott [1902, p. 588]. 

 Acrotreta pyxidicula White [1874, p. 9]. 

 Acrotrcfa ? 



Acrothcle artcmis Walcott [1908^, p. 82]. 

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

 Acrothele subsidua, var. 

 Acrothyra minor Walcott [1905, p. 303]. 

 BiUingsella color ad oensis (Shumard) [i860, p. 627]. 

 flvolillics. 



