Plate 9. 
Page 
Figure 1. Paphia staminea spatiosa Dali . 158 
Coos Bay, Oregon. 
2. Maconia brota Dali . I/O 
Bering Strait. 
3. Semele striosa C. B. Adams . 179 
Panama. 
4. Solemya panamemis Dali . 10 
Panama Bay. 
5. Cyatfwdonta dubiosa Dali . 86 
Off La Paz, Lower California. 
6. Scixicava arctica Linnaeus . 203 
Arctic. 
Photographs from U. S. N. M. Numbers 1, 2, 4, 5 are type specimens. 
