Explanation of Plate 8 



Fig. 1. — Marguritopsis pribilujfensis (Dall) from 741 feet. 



Fig. 2. — Margaritopsis ^ grosvenori (Dall) from 175 feet, apical \'ievv, showing the fine spiral 



lirae and the deep sutures. 

 Figs. 3, 4, 7, 9. — Boreotrophon truncatus (Str0m): }, from 217 feet, aboral \ iew ol specimen 



in which the entire spire is covered with Syncoryne sp.; 4, 9, oral and aboral views of 



specimen from 741 feet; 7, aboral view of specimen from 120 feet (Sept. 15. 1948) from 



foliaccous bryozoan. 

 Figs. 5, 6. — Odostomia cassandra Dall and Bartsch: 5, oral \ie\v of adult from 140 feet; 6, 



aboral view of immature specimen from 453 feet. 

 Fig. 8. — Raphitoma amoena : Sars from 184 feet, aboral \iew showint; the spiral folds. 

 Magnification: 1, X 5.6; 2, X 13; 3, X 5.3; 4, X 3.5; 5, X 12.5; 6, X 22; 7, X 4; 8, X 



11; 9, X 3.1. 



