6 A Canadian Arctic Expedition, 1918-18 



Philine cf. sinuata Stimpson, 200. 



Cylichna nucleola Reeve, 206-c. 



Utriculus semen Reeve, 27s, 206-c. 



Agriolimax hyperboreus Westerlund. Nome, Camden bay. 



JSuccinea chrysis Westerlund, tundra at Nome. 



Lymncea caperata Say; 28i (this probably = vahli Beck.) 



Lymncea stagnalis Linne", var. appressa Say. Mackenzie river delta. 



Aplexa hypnorum Linne". Camden bay; Demarcation point; pond on 

 Herschel island; pond at Collinson point; brackish pond near 

 Teller, Grantley harbour; port Clarence, Alaska. 



Lora trevelliana Turton, 27s. 



Admete middendorffiana Ball, 20d. 



Admete elongata Leche, 23. 



Beringius sp. egg-capsules, 20m. 



Chrysodomus sp. egg-capsules, 20m. 



Chrysodomus liratus Martyn, 206-c, 20m; 23. 



Chrysodomus solutus Herrman, 2Qd; 200; 20m; 24. 



Chrysodomus saturus Martyn, 200; 24. 



Pticifusus johanseni Ball, 24. 



Plicifusus kroyeri Moller, 23. 



Volutopsius stefanssoni Ball, 24. 



Buccinum sp. egg capsules, 20m, 24. 



Buccinum tenue Gray, 22; 23. 



Buccinum orotundum Ball, 22. 



Buccinum normale Ball, 24. 



Buccinum angulosum subcostatum Ball, 24. 



Buccinum angulosum Gray, 24. 



Buccinum plectrum Stimpson, 24. 



Buccinum polar e Gray, 24. 



Buccinum cyaneum Hancock, 24, 22. 



Buccinum glaciale Phipps, 24. 



Thais lamellosa Gmelin, 60a. 



Neptunea beringi Ball, 23. 



Fusitriton oregonense Redfield, 30d (adventitious). 



Boreoscala greenlandica Perry, 23. 



Tachyrhynchus erosus Couthouy, 54e. 



Lacuna divaricata Fabricius, 206-c, 200, 2Qh. . 



Littorina grandis Middendorff, 2Qd, 200. 



Littorina sitkana Philippi, 60a. 



Piliscus commodus Middendorff, 23; 24. 



Natica (Cryptonatica) dausa Broderip & Sowerby, 206-c; 2Qd; 200; 24; 

 54e. 



Euspira pallida Broderip & Sowerby, 23; 24; 281 



Amauropsis purpurea Ball, 206-c; 20d; 24, 281; 31a; 326. 



Velutina zonata Gould, 24. 



"Velutina" spongiophila Middendorff, 24. (Hydroid). 



Acmoea scutum var. patina Eschscholtz, 60a. 



Acmcea pelta Eschscholtz, 60a. 



Acmcea emydia Ball, 22. 



Margarites sordidus Hancock, 22; 23. 



Margarites ecarinatus Ball, 22. 



Machceroplax varicosus Mighels, 23. 



Amicula vestita Sowerby, 22. 



