DESCRIPTION OF PLATE VI CONTINUED. 501 



Page. 

 Figs. 7 to 7c. Spihifer rock ymontanus 383 



A specimen aomewhat larger than the last, well preserved, and very characteristic. 



Fig. 7. Dorsal view. 



7a. Ventral view. 



7b. Side view. 



7c. Anterior view. In this figure the accidental varix of growth is too prominently 



represented. 



Weber formation (?): Horseshoe Mountain, Leadville district (station 2281). 



Figs. 8 and 8a. Squamularia perplexa 392 



A rather large specimen belonging to this species. 



Fig. 8. Dorsal view. 



8a. Side view. 



Maroon formation: Punch Gulch, Crested Butte quadrangle (station 2291). 



Figs. 9 to 9b. Squamulari a perple.xa 392 



A specimen smaller than the foregoing, but of more nearly the usual dimensions. 



Fig. 9. Ventral view. 



9a. Side view. 



9b. Dorsal view. 



Hermosa formation: Deadwood Gulch, Kico quadrangle (station 2224). 



Figs. 10 and 10a. Squamularia perple.xa 392 



A specimen somewhat larger than the last, but from the same locality. This example is 



not quite symmetrical in its growth. 



Fig. 10. Dorsal view. 



10a. Ventral view. 



Hermosa formation: Deadwood Gulch, Rico quadrangle (station 2224). 



Figs. 11 to lie. Spiriferina kentuckyensis 400 



A very small example which may belong to Shumard's species, but is possibly varietally 



different. 



Fig. II. Dorsal view. 



11a. Anterior view. 



lib. Posterior view. 



lie. Side view. 



Hermosa formation: Rico quadrangle (station 2322). 



