DESCRIPTION OF PLATE LXXI— Continued. 599 



Page. 

 Fig. 9. Cliothyris crassicardinalis var. nana n. var 5gg 



a. Ventral view of a somewhat exfoliated specimen, which is regarded as varietally 

 distinct from the above. 

 Madison limestone, Crowfoot Kidge, Gallatin Range, top of bed 25. 



Fig. 10. Spiriferina solidirostris k <5 



a. Ventral valve characteristic of this species. 



Madison limestone, amphitheater east of Bannock Peak, Gallatin Range, bed 28. 



Fig. 11. Holasterella wrighti var. americana n. var 5qc 



re. View of an isolated spicule magnified about twenty diameters. 



Madison limestone, divide between Gallatin Valley and Panther Creek, near Big- 

 horn Pass, Gallatin Range, bed 24. 

 Fig. 12. Endothyra baileyi -q^ 



a. An example from Spergen Hill, Indiana, of a not unusual size, x 12. 



b. Another, smaller specimen from the same locality, x 12. 



Warsaw group, Spergen Hill, Indiana. 



Fig. 13. Endothyra baileyi var. paroa n. var 507 



a, b. Two specimens of the ordinary character, from the Madison limestone, x 12. 



c. A small specimen from the Madison limestone, x 12. 



Madison limestone, White Mountain, Absaroka Range. 



Fig. 14. Proetus peroccidens =7g 



a, b. Glabella and free cheek of the kind occurring in the Madison limestone ; after 

 Hall and Whitfield. 

 Waverly age, Dry Canyon, Utah. 



Fig. 15. Proetus loganensis 577 



re. Pygidium of a type associated with the above in the Madison limestone; after 

 Hall and Whitfield. 

 Waverly age, Logan Canyon. 



