210 BULLETIN 03, UNITED STATES NATIONAL MUSEUM. 



AMERICAN— Continueil. 



BALANUS EVERMANNI Pilsbry. 



Plate 54. 

 1907. Balanus evermanni Pilsbky, 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, KEtJGER, Zoologischer Anzeiger, vol. 38, 



7a, B. (Feb. 17). 

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

 pp. 460, 463. 

 Tyjye.—Qiit. No. 41840, U.S.N.M., from Alhatross station 4239, at 

 the junction of Clarence Strait and Behm Canal, Alaska. 



Distrihut'wn. — 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, w^hich is large, quadrangular and very deeply 

 toothed. White, wdth traces of a thin, pale primrose-j^ellow 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, 

 Avell-spaced growth-ridges or merely some irregular rugic, and 

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



