Bull. U. S. B. F., 1927, Ft. II. (Doc. 1031.) 



Fig. 31. — Rate of growth for barnacles. A and B, one month's growth of Balanus eberneus on glass slides 3 by 1 inch, 

 June 5 to July 4, 1924, at Beaufort, N. C. C and D, two months' growth of B. eberneus on wood at Beaufort, N. C, 

 May 17 to July 16, 1924. E, three months' growth of B. eberneus. May 17 to August 17, 1924. at Beaufort, N. C. 

 F, approximately three months' growth of B. tintinabulum from Rio de Janiero, as collected from the hull of the 

 U. S. S. Nevada 



