Plate 28. 
Page 
igure 1. Modiolaria scrninuda Dali. 78 
2. Lyonsia pH get crisis Dali. 91 
Puget Sound. 
3. Leda extenuata Dali. 22 
4. Yoldia montereyensis Dali.. 28 
5. Pecten jordani Arnold. 55 
Puget Sound. 
6. Pecten jordani Arnold. 55 
Puget Sound. 
7. Nucula carlott crisis Dali. 13 
8. Nucula carlott crisis Dali. 13 
9. Modiolaria taylori Dali. 76 
Enlarged. 
10. Modiolaria taylori Dali. 76 
Enlarged. 
11. Modiolaria vermcosa Middendorff. 78 
12. Atrina oldroydi DalL..-. 47 
Off Point Fermin, San Pedro. 
Reduced about one-half. 
Figures 1, 3, 4, 7, 8, 9, 10, 11 are from U. S. N. M. Proc. 
