Hawaiian Barnacle — UTINOMI 
45 
Fig. 1. Balanus amphitrite hawaiiensis Broch (a, h and e) and B. amphitrite communis Darwin (d) : 
a, Profile of left lateral compartment, showing the arrangement of longitudinal colored stripes, either distinct 
or indistinct (dotted in the figure) ; b, c, basal view of parietal tubes; d, e, labrum. 
the two differ in several important details of 
structure, as summarized in Table 2. 
Consideration of these characteristics will 
prove that the two subspecies are separable from 
each other when large series of specimens are 
examined. 
DISTRIBUTION AND SYNONYMY 
Herewith is presented a summary of accounts 
of the corresponding subspecies of Balanus am- 
phitrite Darwin given by previous workers and 
the supposed geographical distribution of B. 
amphitrite hawaiiensis Broch ( Fig. 3 ) . The evi- 
dence is far from complete and some records of 
occurrence are not conclusive, since most of the 
subspecies or forms of Balanus amphitrite, espe- 
cially the most familiar communis, have been 
insufficiently described (often without detailed 
figures), or are recorded only by a subspecific 
name. Nevertheless, those I have listed may help 
future workers towards the solution of the prob- 
lems presented herein. 
1. Recorded as B. a. hawaiiensis: 
Kaladis Point, Mindanao (Broch, 1922). 
Pearl Harbor, Hawaii (Broch, 1922). 
Honolulu Harbor, Hawaii (Pilsbry, 1928). 
Sasebo, Kure, Maizuru, Seto, and Misaki, 
Japan (Hiro, 1937, 1938). 
Persian Gulf (Nilsson-Cantell, 1938). 
Suo, Kiirun, Tansui, Takao, and Mako, 
Formosa (Hiro, 1939). 
Aio, Seto Inland Sea, Japan (Hudinaga and 
Kasahara, 1942). 
Pearl Harbor and Kaneohe Bay, Hawaii 
(Edmondson and Ingram, 1939; 
Edmondson, 1946) . 
Misaki, Japan (Hirano and Okushi, 1952). 
2. Recorded as B. a. denticulata: 
Suez Canal (Broch, 1927; Ciurea et al., 1933; 
Monod, 1937 ) . 
Southern coasts of Britain (Bishop, 1950; 
Norris et al., 1951; Crisp and Molesworth, 
1951). 
Atlantic coasts of France ( Bishop et al., 
1957). 
Knysha Estuary, South Africa (Millard, 
1950). 
