PLATE XXVI. 



Fig. I. Pecten expansus Dall, view of right valve ; lat. 147 mm. ; p. 706. 



Fig. 2. Pecten coosensis Shumard, view of right valve ; alt. 100 mm. ; p. 700. 



Fig. 3. Pecten deminrgus Dall, view of right valve ; alt. 71 mm. ; p. 718. 



Fig. 4. Pinna caloosa'ensis Uall, interior view of part of left valve near apex ; Ion. 120 



mm. ; p. 660. 



Fig. 5. Pecten Stearnsii Dall, view of right valve ; alt. 71 mm.; p. 706. 



Fig. 6. Pecten Aladisonius var. Sayanus Dall, view of right valve ; lat. 135 mm. ; p. 725. 



Fig. 7. Pecten fucamis Dall, view of mold of left valve ; alt. 85 mm. ; p. 704. 



9 2I 



