128 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. I03 



PLATE 19 



PAGE 



Elvinia bridgei Resser 97 



I, 2. Partially exfoliated cranidium. 

 3, 4. Well-preserved cranidium. 



5. Libragene. (See also pi. 18, figs. 28-31.) 



Honey Creek limestone; (loc. Bqv) West Timbered Hills, Arbuckle 

 Mountains, Oklahoma. (This is the type locality.) 



lilv'mia vagans, new species 98 



6, 7. Dorsal and side views of the holotype cranidium. 

 8, 9. Pygidium (XI.S)• 

 Honey Creek limestone; (loc. 9fi) 15 miles northwest of Fort Sill, 



Wichita Mountains, Oklahoma. 



Elvinia brcinfrons, new species 98 



10, IL Cranidium (X1.5). 



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



14. Libragene. 



Honey Creek limestone; (loc. I2p) 4 miles east of Alpers, Arbuckle 

 Mountains, Oklahoma. 



Taeiiicephaliis pcalei, new species 99 



15, 16. Small cranidium retaining the test (X4)- 



17. Large exfoliated cranidium showing granules under anterior furrow. 



18. Partly exfoliated head and libragene (X3)- 



19. 20. Pygidium (X2.5). 



21. Exfoliated cranidium showing scattered granules (X3)- 



22, 23. The holotype cranidium (X3)- 



Dry Creek shale; (loc. 153) Horsehoe Hills, east of Logan, Montana. 



Tacniccphalns hohnesi, new species 100 



24. Exfoliated cranidium (X2). 



25, 26. Side and dorsal views of the holotype cranidium (X3)- 



27. Pygidium (X3). 



Dry Creek shale; (loc. 66x) Gallatin Valley, northwestern Yellowstone 

 National Park, Wyoming. 



Taenicephaliis libertyensis, new species loi 



28, 29. Holotype cranidium (X2.5). 

 30, 31. Small cranidium (X4)- 



32. Libragene (X2). 



St. Charles limestone; (loc. 56g) 6 miles west of Liberty, Bear River 

 Range, Idaho. 



Tacniccphalns cordillerensis Miller lOl 



33. Surface with cranidia and libragene (X3)- 



Snowy Range formation; (loc. 37r) Warm Springs Creek, Wind River 

 Range, Wyoming. 



