PLATE 24 
All figures approximately natural size 
Fig. la. Macoma inquinata (Deshayes). Longitude 43.5 mm. 
Station D 5830. 
Fig. 1b. Macoma inquinata (Deshayes). Longitude 43.5 mm. 
Station D5830. Note the pallial sinus and compare with figs. le 
and 1d, plate 10. 
Fig. 2. Spisula catilliformis Conrad. Longitude 77 mm. Uni- 
versity of California Collection. Note the hinge of this right valve. 
[380] 
