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GEOLOGICAL SURVEY, CANADA PAPER 47-24

NATHORSTITES FAUNA

‘GREY BEDS’

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Figure 1. Modiolus ahsisi McLearn. Holotype, 8767. Figure 2. Monotis ? montini McLearn.
Holotype, 8765. Figure 3. Pecten ? sarsina n. sp., X 2. Holotype, 9539. Figure 4. Same
species, X 2. Paratype, 9540. Figure 5. ‘Coenothyris’ silvana McLearn. Holotype, 9142.
Figure 6. Hoernesia woyoniana McLearn. Holotype, 8768. Figure 7. Same species. Plesio-
type, 9553. Figure 8. Pleuromya triasina n. sp. Holotype, 9542. Figure 9. Same species.
Paratype, 9543. Figure 10. Spirifer onestae McLearn. Holotype, 9143. Figure 11. Ostrea
atsina n. sp. Holotype, 9538. Figure 12. Pleuromya peacensis n. sp. Holotype, 9541.
Figure 13. Paratrachyceras caurinum n. sp. Holotype, 9548.

PLATE VII