NO. 5 UPPER CAMBRIAN TRILOBITES RESSER I29 



PLATE 20 



PAGE 

 Burnetia cava, new species 83 



I, 2. Dorsal and side views of the holotype cranidium (X2.5). 



3. Libragene (X3). 



Ore Hill formation; (loc. io7v) 5 mile northwest of Drab, Pennsylvania. 



Taenicephahis gratinlosns, new species loi 



4, 5. Side and dorsal views of the holotype cranidium (X 2). 

 6, 7. A less complete cranidium (X2.5). 



"St. Charles limestone; (loc. 4y) Two Mile Canyon, Wasatch Mountains, 

 Idaho. 



Taenicephahis maladensis, new species 102 



8, 9. Side and dorsal views of an exfoliated cranidium (X 3)- 

 10. The holotype cranidium and libragene (X 2.5). 

 St. Charles limestone; (loc. 54x) Two Mile Canyon, 2 miles south of 

 Malad, Wasatch Mountains, Idaho. 



Taenicephahis ortiatus, new species 102 



II, 12. Dorsal and side views of the holotype cranidium (X 3)- 



St. Charles limestone; (loc. 54e) Blacksmith Fork, Bear River Range, 

 Utah. 



Taenicephalus hyrumensis, new species 104 



13, 14. Dorsal and side views of the holotype cranidium retaining 

 most of test (X 2). 



15. Exfoliated cranidium and hypostoma (X2). 



16. Side view of the cranidium in fig. 15 (X2). 



17. 18. Two different views of a cranidium and associated pygidium 



(X2.5). 

 St. Charles limestone; (loc. 55h) Blacksmith Fork, Bear River Range, 

 Utah. 



Taenicephahis speciosus, new species 100 



19. Holotype cranidium and libragene, associated with BilUngsclla 

 exasperata Bell. Portion of another cranidium lies under the 

 libragene. (X i-5-) 



Dry Creek shale; (loc. 62r) Abiathar Mountain, northeastern Yellow- 

 stone National Park, Wyoming. 



Burnetia edwardsi, new species 84 



20, 21. Side and dorsal views of the holotype cranidium and examples 

 of Taenicephahis shumardi and Orygniaspis eryon. 



Franconia sandstone; 2 miles west of Clifton, Monroe County, 

 Wisconsin. 



