2l8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Forfnation and locality. — Upper Cambrian: (150b) Gallatin lime- 

 stone ; thin-bedded limestone in divide at White Creek and Indian 

 Creek Pass, above Red Bluffs or Chinese Wall, Lewis and Clark 

 National Forest, Montana. 



CREPICEPHALUS UPIS, new species 

 Plate 33, figs. 4, 4a-d 



The cranidium and pygidium of C it pis recall those of C. liliana 

 (pi. 29, figs. 5, 5a), and the outer surface is granulated in both 

 species, but not in the same manner. The surface of C. liliana has 

 rather large pustules scattered over it, while those of C. upis are more 

 numerous and smaller. The pygidium is not unlike that of C. coo- 

 sensis (pi. 32, figs, ^b, 3^). The surface of the test between the 

 granulations is slightly pitted and the test is apparently punctate. 



The largest cranidium in the collection has a length of 14 mm. 



Formation and locality. — Upper Cambrian: (150b) Gallatin lime- 

 stone; thin-bedded limestone in divide at White Creek and Indian 

 Creek Pass, above Red Bluffs or Chinese Wall, Lewis and Clark 

 National Forest, Montana. 



CREPICEPHALUS, species undetermined (i) 

 Plate 32, figs. 4, 4a 



An undescribed species of Crepicephalits of the C. iozvensis group 

 is represented by a form of pygidium that is closely allied to that of 

 C. iowensis. It differs in having the postero-lateral spines extending 

 diagonally outward instead of directly backward, and in being pro- 

 portionally wider. 



A specimen from the shaly limestone of the Conasauga formation 

 has a length of 16 mm. and a width of 3 cm. at the anterior margin. 

 A smaller specimen is illustrated (pi. 32, fig. 4). 



Formation and locality. — Upper Cambrian : (107) Maryville lime- 

 stone; Bull Run Ridge, northwest of Copper Ridge, 11 miles (17.6 

 km.) northwest of Knoxville, Knox County; (119) beneath Noli- 

 chucky shale on Cub Creek, 1.5 miles (2.4 km.) southeast of Morris- 

 town, Hamblen County, both in Tennessee. 



Also from (91) Conasauga formation; Cedar Bluff on Coosa 

 River, Cherokee County ; and (16) limestones in Conasauga (Coosa) 

 shales, Murphrees Valley, Blount County, both in Alabama. 



CREPICEPHALUS, species undetermined (2) 

 A second unidentified species of Crepicephalits is indicated by 

 pygidia of the C. iowensis type from the Upper Cambrian. These 



