PLATE II 
Fig. 1. Pterotheca pentagona. Chambly village, province of Quebec. Geo- 
logical Survey of Canada, No. 2155. 
Fig. 2. Pterotheca pentagona. Nicolet River, southwest of Ste. Monique, 
province of Quebec. Geological Survey of Canada. 
Fig. 3. Pterotheca cf. attenuata. Hall. Western shore of Cloche peninsula, 
province of Ontario. Geological Survey of Canada. Lower Lowville red clay 
shales. 
Fig. 4. Strophomena planumbona, variety. A, Chambly village. No. 8404. 
B, Riviere des Hurons, No. 8405. Both from the province of Quebec. Geologi- 
cal Survey of Canada. 
Fig. 5. Archinacella clochensis. Western shore of Cloche peninsula, province 
of Ontario. Geological Survey of Canada. Lower Lowville red clay shales. 
Fig. 6. Cyrtodonta clochensis. Western shore of Cloche peninsula, province 
of Ontario. Geological Survey of Canada. Lower Lowville red clay shales. 
Fig. 7. Rafinesquina mucronata. A mile northwest of Vars, province of Quebec 
Not the types. 7 A, No. 8432; 7 B, No. 8432 a; Victoria Memorial Museum, 
Ottawa, Canada. 
Fig. 8. Lophospira beatrice. Riviere des Hurons, province of Quebec. Types. 
Geological Survey of Canada. 
Fig. 9. Psiloconcha borealis. A, B, Riviere des Hurons; C, Nicolet River, 
southwest of Ste. Monique; all from province of Quebec. B is selected as type. 
Geological Survey of Canada. A, No. 2087. B, No. 8411. C, No. 8412. 
Fig. 10. Colpomya pusilla. Chambly village, province of Quebec. Not the 
type. 
'Fig. 11. Lingula clochensis. A, pedicel valve. No. 8403; B, brachial valve, 
No. 8403a. Western margin of Cloche peninsula, province of Ontario. Geologi- 
cal Survey of Canada. Lower Lowville red clay shales. 
Fig. 12. Cuneamya brevior. Riviere des Hurons, province of Quebec. Geo- 
logical Survey of Canada. 
Fig. 13. Technophorus quincuncialis. Chambly village, province of Quebec. 
Geological Survey of Canada. 
Fig. 14. Pholadomorpha divaricata. Riviere des Hurons, province of Que- 
bec. Geological Survey of Canada, No. 2071. 
Fig. 15. Psiloconcha subovalis, Ulrich. Riviere des Hurons, province of Que- 
bec. Geological Survey of Canada. 
Fig. 16. Pholadomorpha pholadiformis. Hall. Two miles northeast of Gore 
Bay, along the shore, Manitoulin island, province of Ontario. Geological 
Survey of Canada. 
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