Plate 8. 
Page 
'igure 1. Pecten islandiaus Muller . 54 
Exterior of right valve. 
Arnold Tert. Pectens. 
2. Pectcn islandicus Muller . 54 
Exterior of left valve. 
Arnold Tert. Pectens. 
3. Scrripes gronlandicns Gmelin... 145 
Puget Sound. 
4. Marcia kenncrlyi (Carpenter) Reeve . 155 
Puget Sound. 
