408 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Columbia, and the other {F. clytia) in the ^Middle Cambrian, Spence 

 shale member of the Ute formation in southern Idaho. 



PAGETIA BOOTES, new species 



Plate 67, figs. I, la-f 



I have been collecting material representing the Eodiscidee ' for 

 many years, and hope within a few years to describe and illustrate the 

 various forms that appear to belong in the family. At present two 

 species that have eyes and facial sutures of the Proparia type appear 

 to be of such interest as to warrant the publication of a preliminary 

 notice of them. 



Pagetia bootcs has the same general form as Eodisciis pitiictafiis. 

 but it differs most radically in having true eye lobes and palpebral 

 ridges across the fixed cheeks. The median caudal spine is also a 

 marked character of P. bootes. The outer surface of the latter is 

 slightly roughened by an obscure granulation that in places is so 

 irregular that an obscure pitting is suggested. 



The average length of the dorsal shield is from 5 to 7 mm. 



As the illustrations exhibit the character of the dorsal shield. I will 

 not describe the species in detail. 



Formation and locality.— Middle Cambrian: (35k) Burgess shale 

 member of the Stephen formation ; on the west slope of the ridge 

 between Mount Field and Wapta Peak, i mile (1.6 km.) northwest 

 of Burgess Pass, above Field, British Columbia, Canada. 



PAGETIA CLYTIA, new species 



Plate 67, figs. 2, 2a-e 



This species differs from P. bootes in its uniformly smaller size, 

 greater proportional space between the glabella and frontal margin, 

 more transverse cephalon and pygidium. 



The dorsal shield averages from 2 to 3 mm. in length as compared 

 with 5 to 7 mm. for P. bootes. Surface minutely granular. 



Formation and locality. — Middle Cambrian: (55c) Spence shale 

 member of the Ute formation; about 50 feet (15.2 m.) above the 

 Brigham quartzite and 2,755 feet (839.7 m.) below the Upper Cam- 

 brian, in a ravine running up into Danish Flat from Mill Canyon, 

 about 6 miles (9.6 km.) west-southwest of Liberty and 15 miles (24.2 

 km.) west of Montpelier, Bear Lake County, Idaho. 



Raymond, Ottawa Naturalist, Vol. 27, 1913, P- 102. 



