BARNACLES OF JAPAN AND BERING SEA. 
Genus CQNCHODERMA. 
71 
Conchoderma auritum (Linn6). [PI. vm, fig. 5, 6, 7.] 
1767. Lepas aurita Linnaeus, Syst. Nat., ed. xn, p. mo. 
1851. Conchoderma aurita Linnaeus, Darwin, Monograph on the Cirripedia, Lepadidae, p. 141. 
1907. Conchoderma auritum Linnaeus, Pilsbry, Bull. 60 U. S. Nat. Mus., p. 99, pi. ix, fig. 2. 
Specimens adhering to Coronula were taken from the throat of a humpback whale in Plover Bay, 
Siberia, by Dr. W. H. Dali in 1865, and are now in the U. S. National Museum. Color sketches made 
by Doctor Dali from life are reproduced on plate vm. In Atlantic C. auritum the stripes and spots are 
dark purple, but these examples are striped and mottled with deep rose color and rose-pink. In structu- 
ral characters they agree with Atlantic C. auritum. Small scuta and a very minute carina are 
developed. 
The Californian specimens described by Doctor Dali (1883) as Otion stimpsoni were marked with 
purple, like the Atlantic C. auritum. 
Genus HETERALEPAS. 
Heteralepas japonica (Aurivillius). 
Alepas japonica Aurivillius, Kongl. Sv. Vet. Akademicns Handlingar, bd. 26, no. 7, p. 28, Hirado Strait, 
Japan, 80 fathoms. 
Locality: Albatross station 4986, off Hokkaido Island, Japan; 43 0 01' 40" N., 140° 22' 40" E. 
in 103 fathoms. No. 38683 U. S. National Museum. 
Two specimens taken agree in the main with the above-named species, but differ in certain details 
noticed below. The extent of individual and local variation in species of this group is unknown, since 
a majority of the species are known from one lot from a single place, or at best from very few lots. 
The size of two apparently mature specimens is somewhat smaller than japonica — length of capit- 
ulum 10 mm., width 8.5 mm.; length of peduncle 4 mm., length of orifice 3.5 mm. The capitulum is 
plump, with only the weak trace of a carina toward the summit. There are three low dorsal tubercles, 
two on the back of the capitulum and one on the peduncle at the base of the capitulum. The peduncle 
is shorter than in japonica. 
The mandible (fig. 4, A) has three slender teeth and a lower point below which the border pro- 
trudes. Near the edge it is hairy, and both upper and lower margins are bearded. 
The maxilla (fig. 4, C) is deeply excavated below the two great upper spines. 
The first cirrus has about 1 1 and 23 segments, though the rami are not very unequal in length. 
The second, third, and fourth cirri are long with subequal rami, of about 70 segments in the fourth 
cirrus. The fifth and sixth cirri have the inner rami very small, less than half the length of the outer 
rami, and composed of 17 segments. 
The terminal appendages (fig. 4, B) are very short, 2.75 mm. long, of 7 segments. 
The penis is very long, sparsely hairy, with a small terminal tuft. 
