Orthonema dozierensis. Page 168. 



8. — Lateral view of squeeze, X 5/1. No. 7, Dozier collection. 



Pleurotomaria capertoni. Page 163. 



9. — Squeeze of type. No. 5, Dozier collection. 



9a, 96.— Two specimens of this species from Whitehorse sandstone. 

 9c. — Basal view of 9a, showing closed (?) umbilicus. Nos. 77, 78, Dozier 

 collection. 



10. 10a.— Two specimens possibly belonging to this species, but probably 

 distinct. The latter is somewhat distorted. Nos. 22, 23, respectively, Do- 

 zier collection. 



Bulimorpha? alvaensis. Page 169. 

 11. — Side view of cast, natural size. No. 64, Whitehorse collection. 



Capulus? haworthi. Page 169. 



12, 12a, 126.— Outlines of an apical and two lateral views. Two speci- 

 mens. Nos. 31, 32, respectively. Dozier collection. 



Worthenopsis sp. Page 165. 

 13. —Drawing of a squeeze, enlarged. No. 39, Dozier collection, 



Pleurotomaria agnostica. Page 164. 



13a, 136.— Two casts, poorly preserved, enlarged. Nos. 73, 65, White- 

 horse collection. 



Loxonema permiana. Page 167. 



14. — Mold of specimen, X 19/2. No. 12, Dozier collection. 

 14a.— A section of a mold, somewhat diagonal, of another specimen. No. 

 13, Dozier collection. 



Pleurotomaria sp. 



15. — Basal view of cast, showing a sheet of matrix extending into the um- 

 bilicus, demonstrating the existence of an umbilical slit. This species is 

 probably generically distinct from No. 9c on this plate. Unfortunately 

 this specimen was dropped and the matrix broken out after the drawing 

 was made. No. 66, Whitehorse collection. 



