324 
by transverse stripes of the same colour, lending the specimen a 
deceiving similarity with common types of Balanus amphitrite, and 
an examination of the opercular plates also reveals a great Hke- 
ness in structure with Balanus minutus. One difference must be 
emphasized as at once obvious: the yellowish epidermal hairs shin- 
ing as gold, mentioned by Hoek, are still more developed in the 
. . ___ ooo 19 ’ s 149° 40 ’ E a entire animal in side 
Fie. 62. Balanus auricoma trom w Ej - 
view, b and c external view of tergum and scutum, d and e inside 
view of tergum and scutum. [a X 2, b—d X 6]. 
large specimen, forming here a furry coating along the occludent 
margins of the opercular plates. — The interior side of the oper¬ 
cular plates (Fig. 62d, e) is remarkably flat; in the scutum a tn- 
angular pit for the adductor is feebly indicated, and in the tergum 
short crests for the depressor are well developed. 
In the maxilla Hoek speaks of „a broad notch behind the 
upper pair of spines“; this notch is absent in the specimen at 
hånd, and moreover, the smaller bristles at the lower angle are 
here constituting a brush. The labrum is evidently injured, the 
lower part of it a little swollen, possibly owing to regeneration; 
only two very small denticles are seen at one side of the notch. 
Other differences from Hoek’s descriptions are not present, and 
the identity thus seems to be absolutely certain, in spite of the 
great differences in size. 
Subgenus Armatobalanus Hoek. 
