210 BULLETIN" 93, UNITED STATES NATIONAL MUSEUM. 



AMERICAN-Continued. 



BALANUS EVERMANNI Pilsbry. 



Plate 54. 



1907. Balanus evermanni PILSBRY, Bulletin of the Bureau of Fisheries, vol. 

 26, p. 203, fig. 4, pi. 7, figs. 7-14 ; pi. 8, figs. 1-4 ; pi. 10, fig. 1 ; pi. 11, 

 fig. 1 (June 29). 

 1911. Balanus eversmanni Pilsbry, KRUGER, Zoologischer Anzeiger, vol. 38, 



TA, B. (Feb. 17). 

 1911. Balanus eversmanni Pilsbry, KRUGEB, Zoologischer Anzeiger, vol. 38, 



pp. 460, 463. 



TypeCat. No. 41840, U.S.N.M., from Albatross station 4239, at 

 the junction of Clarence Strait and Behm Canal, Alaska. 



Distribution. Southern Alaska through Bering Sea to the Kuril 

 Islands, in 72 to 248 fathoms, bottom temperature 37.l to 48.8 F. 



The barnacle is tubular, tulip-shaped, enlarging upward, usually 

 with the summits of the compartments, except the carina, curving 

 inward at the aperture, which is large, quadrangular and very deeply 

 toothed. White, with traces of a thin, pale primrose-yellow epider- 

 mis, which is deciduous in large part, often wholly lost, and more 

 persistent on the radii than on the parietes. The opercular valves are 

 white under a similar epidermis. The parietes have low, transverse, 

 well-spaced growth-ridges or merely some irregular rugre, and 

 usually show fine, irregular, longitudinal strise ; next to the radii and 



