NO. 5 CAMBRIAN TRILOBITES 39I 



Formation and locality. — Middle Cambrian: (4d) Limestone; 

 divide at head of Sheep Creek, north end of Teton Range, 

 Wyoming. 



ASAPHISCUS ?, species undetermined (2) 



Plate 63, figs. 3, 3a 



This species is represented by a single pygidium that is doubtfully 

 referred to Asaphiscus. Its appearance and characters are shown 

 by the illustration. 



Formation and locality. — Upper Cambrian : (119) Maryville lime- 

 stone ; beneath Nolichucky shale, on Cub Creek, 1.5 miles (2.4 km.) 

 southeast of Morristown, Hamblen County, Tennessee. 



ASAPHISCUS, species undetermined (3) 



This species is represented by a pygidium of the Asaphiscus {?) 

 capella form and four crushed thoracic segments. It is noteworthy 

 as being larger than other species referred to Asaphiscus. The 

 pygidium has a length of 11 mm. and an anterior width of 19 mm. 



Formation and locality. — Upper Cambrian: (30 o) Weeks forma- 

 tion ; about 3,950 feet (1,204 ni.) above the Lower Cambrian in the 

 shaly limestones forming i^ of the Weeks formation, on the north 

 side of Weeks Canyon, about 4 miles (6.4 km.) south of Marjum 

 Pass, House Range, Millard County, Utah. 



DOUBTFUL SPECIES OF ASAPHISCUS 



The following species from the Upper Cambrian or later forma- 

 tions are tentatively referred to Asaphiscus pending the discovery of 

 better material that may lead to a more correct interpretation of their 

 generic relations. 



ASAPHISCUS ? AGATHO, new species 



Plate 63, figs. 9, ga 



This species is represented by a small Asaphiscus-\\k.e cranidium 

 that is much like the cranidium of Asaphiscus ? Horus. It dififers in 

 the width of the frontal limb and border and a narrower postero- 

 lateral limb. Length of cranidium, 5 mm. The associated pygidium 

 is illustrated by figure 9a. 



Formation and locality. — Upper Cambrian ?: (loyg) Kittatinny ? 

 limestone ; 100 feet more or less of limestone in middle of sandy dolo- 

 mite 1,000 feet thick or more; 0.5 mile (0.8 km.) west of Drab, 

 Blair County, Huntingdon quadrangle (U. S. G. S.), Pennsylvania. 



Also from (123a) Maryville limestone; 4 miles (6.4 km.) north- 

 east of Rogersville, Hawkins County, Tennessee. 



