PLATE V 
Fig. 1. MODIOLOPSIS BREVANTICA n. sp .p 332 
A, cardinal view; B, left valve. Type. From the Waynesville 
member of the Richmond group at Clay Cliff, 4 miles south of 
the end of Cape Smith, on the eastern shore of Manitoulin 
Island, Ontario. 
Fig. 2. PHOLADOMORPHA SULCATA Miller and Faber (=Ph. pho- 
ladiformis Hall) p 337 
Left valve, with several longitudinal folds due to oblique com- 
• pression within soft shale. Type of Modiolopsis sulcata, No. 
8798, in the Faber collection at Chicago University. Labelled 
as coming from Warren county, Ohio. Probably from the 
Richmond group. 
Fig. 3. PHOLADOMORPHA DIVARICATA Hall and Whitfield (=Ph. 
pholadiformis Hall) .p 333 
A, left valve; B, cardinal view; C, right valve enlarged. Type 
of Sedgwickia divaricata. No. 1489, in the James collection at 
Chicago University. From the upper or Blanchester division 
of the Waynesville member of the Richmond group, at Blanches- 
ter, Ohio. 
Fig. 4. PHOLADOMORPHA CAPAX Miller (=Ph. pholadiformis Hall)p 334 
A, right valve; B, cardinal view, with anterior end toward the 
upper part of the figure. Type of Modiolopsis capax, No. 
8802, in the Faber collection at Chicago University. From 
Versailles, Indiana. Probably from the Waynesville member 
of the Richmond group. 
Fig. 5. PHOLADOMORPHA CORRUGATA Miller and Faber (=Ph. 
pholadiformis Hall) p 336 
Left valve. Type of Modiolopsis corrugata, No. 8813, in the 
Faber collection at Chicago University. Labelled as coming 
from Warren county, Ohio. Probably from the Waynesville 
member of the Richmond. 
Fig. 6. VALLATOTHECA MANITOULINI Foerste ............... .p 339 
Oblique view, with apex toward the lower right hand corner 
of the figure. Photographed so as to show the concentric lamel- 
lose outgrowths of the shell, and the short longitudinally di- 
rected stri^, terminating at the free margins of the lamellse. 
Magnified about 3.5 diameters. Type, From the Waynesville 
member of the Richmond group, at Clay Cliff, on the eastern 
shore of Manitoulin island. 
C’ 
350 
