26 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 97 



PAGE 

 Zacanthoides abbreviatns, new species 10 



Figs. 7 (X2), 8. Small pygidia showing the stout axis. 



Fig. 9. Nearly complete holotype. 

 Zacanthoides holopygus, new species 10 



Fig. 10. Holotype. 



Fig. II. Several individuals. 



Fig. 12. Pygidium (X2). 

 Elrathina offula, new species 19 



Figs. 13 (X2), 14 (X i-5)- Paratype and holotype cranidia. 

 Oryctocephalus walcotii Resser 13 



Fig. 15. Pygidium, thorax and doublure with attached hypostoma 

 (X1.5). 



Figs. 16 (X L5), 18. Cranidia. 



Fig. 17. Pygidium (X2). 

 Poliella anteros (Walcott) '. 12 



Fig. 19. Holotype. 



Fig. 20. Underside with hypostoma. 

 Poliella caranus (Walcott) 11 



Fig. 21. Holotype (X2). 

 Oryctocare geikei Walcott 14 



Fig. 22. Holotype ( X 5 ) ■ 



Fig. 23. Pygidium (X2). 

 Aynoshvs honnerensis Resser 8 



Fig. 24. A good example (X6). 



Figs. 25, 26. Separate shields (X6). 

 Agnostus brighamensis, new species 8 



Fig. 27. Holotype pygidium (X6). 



Fig. 28. Cranidium, Pagetia and Lingnlella (X6). 



Fig. 29. Pygidium, Oryctocephalus and Clavaspidella (X3)- 



Locality 20x. 

 Pagetia clytia Walcott 8 



Fig. 30. Several entire individuals (X6). 



Fig. 31. Cranidium (X6). 



Fig. 32. Pygidium (X6). 



Plate 3 



Kootenia idahoensis, new species 15 



Fig. I. Holotype. 



Fig. 2. Partially exfoliated pygidium. 



Fig. 3. Cranidium with occipital spine. 

 Koolcnia spcncci, new species 15 



Fig. 4. Holotype pygidium (Xi-5)- 



Fig. 5. Portion of pygidium showing pleural development (X i-5)- 

 Kootenia mathezvsi, new species 16 



Fig. 6. Holotype pygidium. 



Fig. 7. Squeeze of an imperfect cranidium. 



Locality 20x. 



