NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 153 



Section ALGARODA Dall, 1918. 

 LITTORINA SQUALIDA Broderip and Sowerby, 1829. 



Zool. Journ., vol. 4, p. 370; Zool. Beechey's Voy., p. 139, pi. 34, fig. 12 — 

 Middendorff, Beitr. Mai. Rossica, vol. 2, p. 57 ; Sibirische Iteise, pi. 11, 

 figs. 4-10. 



Cape York, Arctic Ocean, to Pribilof Islands and the Okhotsk Sea. 



Section LITTORIVAGA Dall, 1918. 



LITTORINA SITCHANA Philippi, 1845. 



Proc. Zool. Soc, p. 140.— Tkyon, Man., vol. 9, p. 240, pi. 41, fig. 90. 

 Southern Bering Sea, both coasts, and southward on the east to Puget 

 Sound. 



LITTORINA ATKANA Dall, 1886. 



Proc. U. S. Nat. Mus., vol. 9, p. 211 ; vol. 24, pi. 39, fig. 11. 

 Kyska Island, Alaska, and eastward to Cook's Inlet. 



LITTORINA ALEUTICA Dall, 1872. 



Proc. Cal. Acad. Sci., vol. 4, p. 271, pi. 1, fig. 3; Proc. U. S. Nat. Mus., vol. 

 24, pi. 39, figs. 4, 6. 



Pribilof Islands and the Aleutians from Kyska eastward to the Chika 

 Islands, on isolated islets. 



LITTORINA GRONLANDICA Menke, 1830. 



Synopsis, p. 45. — Tryon, Man., vol. 9, pi. 41, fig. 7. 



The Okhotsk and Bering seacoasts and eastward to Sitka, Alaska ; Puget 

 Sound? Also Greenland. 



LITORINA RUDIS Donovan, 1800. 



British Shells, vol. 1, pi. 33, fig. 3. 



Aleutian Islands to Puget Sound. Also Atlantic. 



LITORINA PLANAXIS Philippi, 1847. 



Abb. u. Beschr.. Littorina, pi. 4, fig. 16. 



From Puget Sound south to Magdalena Bay, Guadelupe and Socorro Islands. 



Subgenus Melartiaphe (Miihlfeldt) Menke, 1828. 



MELARHAPHE SCUTULATA Gould, 1849. 



Proc. Boston Soc, Nat. Hist., vol. 3, p. 83. — Tryon, Man., vol. 9. pi. 45, figs. 

 98-100; 1-3. 



Kodiak Island, Alaska, south to Turtle Bay, Lower California, and Socorro 

 Island. 



Subgenus Algamorda Dall, 1918. 



ALGAMORDA NEWCOMBIANA Hemphill, 1876. (Plate 5, fig. 5.) 



Proc. Cal. Acad. Sci., vol. 7, p. 49 ; Cat. N. Ainer. Shells, p. 6, No. 537. 

 Humboldt Bay, California. 



? ALGAMORDA SUBROTUNDATA Carpenter, 1865. 

 Ann. Mag. Nat. Hist., ser. 3, vol. 14, p. 28. 

 Neah Bay, Washington. 



? ALGAMORDA CASTANEA Carpenter, 1865. 



Ann. Mag. Nat. Hist., ser. 3, vol. 14, p. 28. 

 Neah Bay, Washington. 



