390 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



ASAPHISCUS WHEELERI Meek 



Plate 58, figs. I, la-g 



Bathyurcllus (Asaphiscus) wheeleri Meek, 1873, Sixth Ann. Rept. U. S. 



Geol. Survey Terr., p. 485, footnote. (Brief description.) 

 Asaphiscus wheeleri White, 1875, Rept. U. S. Geog. and Geol. Expl. and 



Surv., West looth Merid., Vol. 4. p. 43, pi. 2, figs. la-f. (Describes 



and illustrates species.) 

 Asaphiscus wheeleri Walcott, 1886, Bull. U. S. Geol. Surv., No. 30, p. 220, 



pi. 31, figs. 3, 2)0'', pl. 25, fig. 9. (Describes and gives restored figure 



of species.) 

 Asaphiscus wheeleri Miller, 1889, North American Geol. and Pal., p. 530, 



text fig. 965. (Brief description and one figure.) 

 Asaphiscus wheeleri Grabau and Shimer, 1910, North American Index 



Fossils, Vol. 2, p. 289, fig, 1596. (Illustrates with reduced figure from 



Walcott.) 



The description by White gives a very good conception of the 

 dorsal shield of this species. Its most marked difference when com- 

 pared with other species is the absence of genal spines. Specimens 

 of the entire dorsal shield and the separate cephala and pygidia are 

 very abundant in the Wheeler formation, east of Antelope Springs. 



Formation and locality. — Middle Cambrian: (3s, 31, 8g, 4) 

 Wheeler formation ; about 1,700 feet (518.2 m.) above the Lower 

 Cambrian and 2,700 feet (823 m.) below the Upper Cambrian in the 

 shaly limestones and calcareous shales of the Wheeler formation, in 

 the eastern part of Wheeler Amphitheater, east of Antelope Springs, 

 House Range ; and (15b) same horizon; near Swasey Spring, House 

 Range, all in Millard County, Utah. . 



Also (loy, loz) Marjum formation; about 2,900 feet (884 m.) 

 above the Lower Cambrian and 1,500 feet (457.2 m.) below the 

 Upper Cambrian in the central part of the limestone forming la of 

 the Marjum limestone about i mile (1.6 km.) south-southwest of 

 Marjum Pass, House Range, Millard County, Utah. 



ASAPHISCUS, species undetermined (i) 

 A number of pygidia that occur in a thin-bedded, dark-blue lime- 

 stone in northern Wyoming have the general appearance of the 

 pygidium of Asaphiscus {?) capella, and the associated free cheek 

 has a genal spine and is more like that of A. {f) capella, but in the 

 absence of a cranidium it is difficult to make even a tentative specific 

 identification. 



