Explanation of Plate 2 



Fig. 1. — Admete couthouyi var. middendorfftana Dall from 80 feet, showing tuniidit\-, weak 



axial folds, and broad canal. 

 Figs. 2, 3. — Admete couthouyi Jay, var., from 341 and 175 feet, respectively, showing more 



slender form, stronger axial folds and spiral sculpture, and narrow-er canal. 

 Fig. 4. — Plicifusus kroyeri (Moller) from 341 feet, young specimen. 

 Fig. 5. — Puncturella noachina (Linnaeus) from 184 feet, apical view-. 

 Fig. 6. — Margarites avenosooki, new species, from 420 feet, showing weak axial folds, fairh" 



uniform spiral lirae, and absence of keel. (Paratype, Stanford Univ. Paleo. Type Coll. 



No. 8331.) 

 Fig. 7. — Margarites frigidus Dall from 420 feel. 



Figs. 8, 9. — Aquilonaria turneri Dall from 217 and 151 feet, respectively. 

 Fig. 10. — Margaritopsis piibiloffensis (Dall) from 741 feet. 

 Fig. 11. — Solariella obscura (Couthouy) from 132 feet, umbilical view. 

 Fig. 12. — Margaritopsis : grosvennri (Dall) from 175 feet. 

 Magnification: .Ml X 2.7. 



