NO. 5 UPPER CAMBRIAN TRILOBITES— RESSER 49 



KINGSTONIA ROBSONENSIS, new species 



Plate 8, Figures 14, 15 



A single cranidium, fortunately rather well preserved, was found 

 in the collection, showing that the Sullivan formation should be recog- 

 nized in the Robson District. This cranidium is of average size and 

 shape. The glabella is defined by a complete dorsal furrow, which 

 shows as a darker line through the test but is not expressed as a 

 furrow. A narrow striated brim is present and the posterolateral 

 limbs are wide and bluntly rounded at the ends. 



Sullivan formation; (loc. 6ir) Moose River, lo miles northeast of 

 Robson Peak, British Columbia. 



Holotype.—U.S.'NM. No. 108711. 



KINGSTONIA SULLIVANENSIS, new species 



Plate 8, Figures 16-19 



This globular species with rather large posterolateral limbs has a 

 faintly defined glabella. A distinctly thickened and striated rim char- 

 acterizes the holotype. The posterolateral limbs are rounded off 

 abruptly. 



Sullivan formation; (loc. 64m) Sullivan Peak, 48 miles northwest 

 of Lake Louise, Alberta. 



Holotype. — U.S.N.M. No. 108712a; paratypes, No. 108712b. 



KINGSTONIA PROMISSA, new species 

 Plate 8, Figures 20-23 



Numerous cranidia and a few pygidia represent this species, which 

 is slightly smaller than average. It is a short form with relatively 

 wide fixigenes and large posterolateral limbs. The glabella is outlined 

 only in the rear. In cross section the cranidium is very convex ; the 

 convexity being attained by the steeply inclined posterolateral limbs 

 and a very sharp bending at the top of the glabella. Longitudinally 

 the convexity is that of a quarter sphere. The pygidium is very 

 plump, swelling greatly toward the rim. 



Sullivan formation; (Iocs. 64c, j) Glacier Lake Canyon Valley, 

 48 miles northwest of Lake Louise, Alberta. 



Holotype. — U.S.N.M. No. 108713a; paratype. No. 108713b. 



