Gai 
PLATE IV. 
Pecten (Amusium) Dalli E. A. Smith; 62.0; inside of lower valve. 
Page 209. 
Same, inside of upper valve. 
Pecten (Pseudamustum) Sigsbeet Dall; 11.5. Page 223. 
Pecten (Propeamusium) Pourtalesianus Dall, var. marmoratus ; 18.5. 
Page 211. 
. Pecten (Pseudamusium) imbrifer Loven; 12.5. Page 220. 
. Dimya argentea Dall; 12.0. Page 228. 
Cardium ceramidum Dall; 8.2. Page 269. 
Cardium peramadilis Dall; 12.5. Page 269. 
Abra lioica Dall; 8.1. Page 278. 
Sazicava azaria Dall; 25.0. Page 317. 
