122 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I03 



PLATE 13 



PAGE 



Maryvillia alberta, new species 70 



I, 2. Dorsal and side views of the holotype cranidium (X^). 

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



northwest of Lake Louise, Alberta. 

 3, 4. A pygidium referred to species (X i-S)- 

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



northwest of Lake Louise, Alberta. 



Meicoraspis banffensis, new species 72 



5, 6. Dorsal and side views of the holotype cranidium (X2). 

 f, 8. An exfoliated cranidium (X 2). 

 9, 10. Pygidium (X4)- 



Sullivan formation; (loc. 66m) 4I miles northwest of Banff, Sawback 

 Range, Alberta. 



Maryvillia montis, new species 71 



II. Cranidium (X2). 



12, 13. Side and dorsal views of the holotype pygidium. 

 Deadwood formation; (loc. 17L) \ mile west of Deadwood, Black 

 Hills, South Dakota. 



Maryvillia hybrida, new species 71 



14, 15. Cranidium (X1.5). 



16, 17. Dorsal and side views of the holotype pygidium (X i-S)- 

 Cap Mountain formation; (loc. I4d) Bartlett Hollow, Burnet County, 

 Texas. 



Coosia canadensis , new species 73 



18, 19. Dorsal and side views of the holotype cranidium (X i-5)- 



20. Pygidium (X2). 



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

 northwest of Lake Louise, Alberta. 



Coosella texana, new species 75 



21, 22. Pygidium (X 1.5). 



23, 24. Dorsal and side views of the holotype cranidium (X i-S)- (See 



also pi. 14, figs. 2-5.) 

 Cap Mountain formation; (loc. I4d) Bartlett Hollow, Burnet County, 



Texas. 



Coosia albertensis, new species 73 



25, 26. Pygidium. (25, X2; 26, X i-5-) 



27, 28. Side and dorsal views of the holotype cranidium (X i-5)- 

 Sullivan formation; (loc. 65i) Glacier Lake Canyon Valley, 48 miles 

 northwest of Lake Louise, Alberta. 



Coosia dakotensis, new species 74 



29, 30. Side and dorsal views of the holotype cranidium (X i-S)- 



31. Pygidium, impression of the cranidium, and libragenes showing 



the wide doublure (X i-5)- 

 Deadwood formation; (loc. 17J) Galena, Black Hills, South Dakota. 



