PLATE 14 



PAGE 



Maryvillia zuyoiningensis (Resser) 67 



1. Partially exfoliated cranidium associated with the holotype of 



Tricrepicephalns tripunctatus (Whitfield). (See also pi. 12, figs. 

 14-20.) 

 Pilgrim formation ; near Moss Agate Springs, Castle Mountains, 

 Montana. 

 Coosella texana, new species 75 



2, 3. Dorsal and side views of a nearly complete cranidium. 

 4, 5. Portion of pygidium. (See also pi. 13, figs. 21-24.) 



Cap Mountain formation; (loc. 67a) Potatotop, 7 miles northwest of 

 Burnet, Texas. 



Coosella brevis, new species 76 



6, 7. Dorsal and side views of the holotype cranidium (X3)- 

 8, 9. The pygidium (X2). 



Warrior limestone; (loc. 38e) i mile northwest of Benore, and 5 miles 

 west of State College, Pennsylvania. 



Blountia (?) disparilis, new species 61 



10, II. Side and dorsal views of the holotype cranidium. (10, X 2.5 ; 



II, X 2.) 

 Sullivan formation; (loc. 64h) Glacier Lake Canyon Valley, 48 miles 

 northwest of Lake Louise, Alberta. 

 Blountia plana, new species 60 



12. Somewhat distorted pygidium (X 1-5 )• 



13, 14. Dorsal and side views of the holotype pygidium (X i)- 

 Sullivan formation; (loc. 64c) Glacier Lake Canyon Valley, 48 miles 



northwest of Lake Louise, Alberta. 

 Maryvillia mooscnsis, new species 72 



15. Holotype cranidium (X2.5). 



16, 17. Side and dorsal views of a pygidium (X i-5)- 



Lynx formation; (loc. 6ir) drift on Moose River, 10 miles northeast of 

 Robson Pass, British Columbia. 

 Illaennrns albcrtensis, new species 38 



18. Exfoliated cranidium (X2.5). (See also pi. 6, figs. 8-12.) 



Lyell formation; (loc. 2od) Tilted Mountain Brook, 9 miles east of 

 Lake Louise, Alberta. 

 Blountiella alberta, new species 61 



19, 20. Partially exfoliated cranidium (X2.5). 

 21. Longitudinally shortened cranidium (X3)- 



22-24. Dorsal, side, and front views of the holotype cranidium (X 3-5). 

 25, 26. Partially exfoliated cranidium (X3)- 



Sullivan formation; (Iocs. 64b, c) Glacier Lake Canyon Valley, 48 

 miles northwest of Lake Louise, Alberta. 

 Blountia kindlei, new species 60 



27. Pygidium retaining most of test (X3-5)- 



28, 29. Large pygidium (X2). 



30, 31. Dorsal and side views of the holotype cranidium (XS)- 

 Warrior limestone; (loc. 38e) i mile northwest of Benore, 5 miles west 

 of State College, Pennsylvania. 



Pterocephalina texana, new species 76 



32, 33- Side and dorsal views of the holotype pygidium (X2). 

 Wilberns formation; (loc. 69) Honey Creek, 8 miles southeast of 

 Llano, Texas. 

 Pterocephalina notha, new species '^y 



34. Cranidium and holotype pygidium. 



35, 36. Small cranidium (X2.5). 



37, 38. Partially exfoliated cranidium. 



Mendha limestone; (loc. 7J ) i mile north of Italian Ranch foothills, 



north end of Quinn Canyon Range, Nevada. 



Pterocephalina bilobata (Hall and Whitfield) yy 



39, 40. Incomplete cranidium. 



41, 42. Small pygidium (X2). 



43. Pygidium of normal size. 



Secret Canyon shale; (loc. 61) south of Hamburg Mine, Eureka District, 



Nevada. 



123 



