Hawaiian Barnacle — Utinomi 
49 
temperature cycle rather than with salinity. 
Therefore, as might be expected, there is no 
particular correlation between successful estab- 
lishment of fouling organisms and the variable 
salinity of sea water in the different regions 
where the barnacle makes a successful settlement. 
SUPPLEMENTAL NOTE 
After the present paper was submitted, an 
article by John D. Costlow and C. G. Bookhout, 
entitled "Larval development of Balanus amphi- 
trite var. denticulata Broch reared in the lab- 
oratory,” appeared in the Biological Bulletin, 
114(3): 284-295, June, 1958. In this paper 
they confirmed the fact that B. amph. denticulata 
occurs abundantly as an important fouling or- 
ganism at Beaufort, North Carolina, on the east 
coast of North America, and that it is wholly 
identical with B. amph . hawaiiensis in all 
naupliar stages during metamorphosis. The oc- 
currence of this subspecies there may be sup- 
posed also from the illustrations given in Weiss 
(1948). 
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