Cirripeds from Ogasawara- — UTINOMI 
97 
the original description, but the difference is 
probably unimportant. The tergum seems to be 
more narrowly elongate than in the Hawaiian 
specimens, and nearly akin to that of Balanus 
auricoma Hoek, but there is no doubt that they 
are specifically distinct in other respects. 
The mouth parts agree in all particulars with 
the description of Pilsbry. The same is also 
established as regards the cirri. 
Me astir ements in mm.: Specimens 
A B C D 
Carinorostral diameter 6.0 5.8 5.3 4.9 
Height 3.4 3.8 2.5 2.6 
Locality: N. 26°40', E. 140° 5 5', southwest of 
Titi-zima, 70-80 fathoms. Twenty-four speci- 
mens on spines of the sea urchin Compsocidaris 
pyrsacantha Ikeda, together with B. pseudauri- 
coma and B. kriigeti. 
Balanus ( Solidobalanus ) pseudauricoma 
Broch 
Fig. 4 
This species has heretofore been recorded by 
Broch (1931) from the Menado Bay, Celebes, 
and west of Nagasaki (N. 32°25', E. 128°33') 
at a depth of 400 to 500 m. The present speci- 
mens may be referred to this species, though 
some slight differences are found to occur. 
