PLATE VII. 



Pseudomonotis sp. Page 156. 

 1.— Portion of flat valve, natural size. No. 103. Whitehorse collection. 



Conocardium oklahomaense. Page 151. 



2.— Mold of a specimen, about natural size. 



2a.— Squeeze of the same. No. 33, Whitehorse collection. 



26.— Drawing of a fragmentary specimen, greatly enlarged, to show the 

 markings on the posterior of the shell. No. 35, Whitehorse collection. 



2c. —Vertical view of a cast. 



2rf.— Lateral view of same. No. 36, Whitehorse collection. 



2e.— Greatly enlarged portion of the mold of another specimen, to show 

 the fine markings on the umbonal keel. No. 34, Whitehorse collection. 



2/. —A portion of the mold of another specimen, enlarged, showing the 

 larger longitudinal ridges on the posterior portion of the shell. No. 37, 

 Whitehorse collection. 



Edmondia rotunda. Page 150. 



3. -Profile of cast, showing slit formerly occupied by the platform beneath 

 the beak, characteristic of the genus. Enlarged. No. 75, Whitehorse col- 

 lection. 



3a. — Left valve of same, natural size. 



36.— Left valve of another specimen. No. 76, Whitehorse collection. 



Edmondia cumminsi. Page 151. 



4. —Cast of type specimen, natural size. No. 57, Dozier collection. 

 4a. —Another specimen, natural size. No. 104, Dozier collection. 



Allorisma? albequus. Page 160. 



5.— Cast of right valve, X2/1. No. 105, Whitehorse collection. 



5a.— Cast of left valve, X2/1. No. 106, Whitehorse collection. 



56.— Cast of right valve, from Texas, X 2/1. No. 55a, Dozier collection. 



5c.— Cast of left valve, X2/1. No. 55, Dozier collection. 



Schizodus? oklahomaensis. Page 157. 

 6.— Cast of valves, natural size. No. 46, Whitehorse collection. 

 Schizodus ovatus?. Page 157. 



7. —Cast of left valve, imperfect in posterior outline, natural size. No, 8, 

 Whitehorse collection. 



(over) 



