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PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 66 



Page 



Fig. 8. Amphissa (Cosmioconcha) palmeri Dall, alt. 18 mm 2 



9. Amphissa (Cosmioconcha) pergracilis Dall, alt. 24 mm 2 



10. Borsonella callicesta Dall, alt. 19.3 mm 6 



11. Neptunea (Trophonopsis) maclaini Dall, alt. 6.5 mm (immature). 22 



12. Cirsotrema plexis Dall, alt. 45.5 mm 10 



12a. Enlargement of surface of varix to show the character of the 



minor sculpture of Cirsotrema plexis. 



Plate 22 



Fig. 1. Antiplanes thalaea Dall, alt. 40 mm 



2. Boreoscala greenlandica Perry, alt. 52 mm 



3. Neptunea alaskana Dall, alt. 32 mm 



4. Plicifusus arcticus Philippi, alt. 103 mm 



5. Trophon pinnatus Dall, alt. 70 mm 



Plate 23 



Pig. 1. Neptunea gorgon Dall, alt. 39 mm 



2. Lyonsia magnifica Dall, Ion. 25 mm 



3. Margarites albolineatus E. A. Smith, base of shell, lat. 11 mm 



4. Metula elongata Dall, alt. 35.5 mm 



5. Solariella elegantula Dall, base, diam. 5.5 mm 



6. Margarites albolineatus E. A. Smith, profile, lat. 11 mm 



7. Trichodiscina verdensis Dall, profile, lat. 18.5 mm 



8. Eucalodium (Anisospira) orcutti Dall, alt. 39 mm., including 



apical whorls 



9. Solariella elegantula Dall, alt. 5.5 mm 



10. Trichodiscina verdensis Dall, base, lat. 18.5 mm 



11. Section showing internal structure of Eucalodium orcutti 



12. Trichodiscina verdensis Dall, upper surface, diam. 18.5 mm 



Plate 24 



Fig. 1. Pyrulofusus harpa Morch, natural size 



2. Calliostoma nepheloide Dall, profile, alt. 25.5 mm 



3. Calliostoma nepheloide Dall, base, diam. 22 mm 



Plate 25 



Fig. 1. Pupillaria rossica Dall, alt. 30 mm 



2. Littorina gronlandica Menke, alt. 11 mm 



3. Volvula bushi Dall, Ion. 4.6 mm 



4. Tritonalia circumtexta Stearns, alt. 22 mm 



5. Volvula aspinosa Dall, Ion. 4 mm 



6. Pupillaria striata Broderip and Sowerby, alt. 19 mm 



7. Littorina sitkana Philippi, alt. 16 mm 



Plate 26 



Fig. 1. Emarginula choristes Dall, basal Ion. 17 mm 



2. Colus (Axdacofusus) roseus Dall, alt. 22 mm 



3. Cocculina japonica Dall, Ion. 8.2 mm 



4. Emarginula choristes Dall, alt. 18 mm 



4 



6 



22 



24 



28 



22 

 19 

 19 

 20 

 26 

 19 

 28 



17 

 26 



28 

 17 



28 



25 

 9 

 9 



24 

 19 

 31 

 28 

 31 

 24 

 19 



16 

 13 

 11 

 16 



