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PACIFIC SCIENCE, Vol. III, January, 1949 
calcified, and compactly imbricate as in Mitella 
and also Scillaelepas. The complemental male 
bears the rudimentary terga, though the general 
features are somewhat similar to those of Calan- 
tica as well as of Smilium. These peculiarities 
seem to me to justify the institution of a new 
subgenus, Paracalantica , under the genus Calan- 
tica Gray, for this cirriped. As I have only a 
single specimen at present I do not venture to 
separate it genetically from the latter genus. 
The subgenus Paracalantica is diagnosed as fol- 
lows: 
Scalpellidae with a capitulum of 11 valves 
forming two whorls; upper whorl comprising 
paired scuta, terga, and a carina, the tergum 
occupying the space between scutum and Ca- 
rina; lower whorl comprising two pairs of 
latera, a rostrum, and a subcarina. Subcarina 
and rostrum very large, high, the former 
stronger than the latter. Scutum with umbo 
subcentral; umbo apical in remaining valves. 
Peduncle with imbricate scales. Male with a 
capitulum, comprising four large valves and 
rudimentary paired terga, and a short peduncle. 
In the reduction in the number of valves as 
well as in the peculiar habitat, this cirriped 
seems to be somewhat allied to Smilium hypo- 
crites Barnard (1924). The specimen is com- 
pletely overgrown by the coenenchym of the 
gorgonian and by the polyps, which contain 
abundant spicules, as well. However, this cir- 
riped in no way indicates such reduction in the 
size of all valves as is shown in S. hypocrites , 
which, according to Barnard, is u a true Smilium 
in process of simplification owing to its pro- 
tected habitat.” It is thus doubtful whether his 
species is to be placed in the same group as 
the present species. 
Trilasmis (Trilasmis) eburnea Hinds 
This curious cirriped has occasionally been 
found attached to spines of echinoids from the 
Malay and Hawaiian Archipelagoes. The speci- 
men examined here measures about 4 mm. in 
length of capitulum, 2.5 mm. in breadth of 
capitulum, and 1.3 mm. in length of peduncle. 
This is the second record of its occurrence in 
our territory, since I have recorded it once from 
off Tonda near Seto (Hiro, 1937). 
Locality: M. 27° 16', E. I40°55 r , southwest 
of Titi-zima, 500 fathoms. One specimen on 
a spine of the sea urchin Pseudo boletia sp., Aug. 
1, 1938, Ikeda leg . 
Balanus ( Chirona ) krugeri Pilsbry 
This species was recorded from the Ogasa- 
wara Islands (Hiro, 1939). The present ma- 
terial consists of two specimens attached to 
spines of a sea urchin, together with the fol- 
lowing two barnacles. One of them measures 
about 10 mm. in carinorostral diameter and 7 
mm. in height. 
Balanus ( Solidobalanus ) hawaiensis 
Pilsbry 
Fig. 3 
This species was first described by Pilsbry 
(1916) on specimens attached to spines of 
the sea urchin Phyllacanthus thomasi Agassiz, 
taken from the Hawaiian Islands at a depth 
of 21-222 fathoms. Since then there has been 
no record of its occurrence whatever. The pres- 
ent specimens agree well with the description 
and figure of Pilsbry. This cirriped, together 
with Balanus pseudauricoma, found on the sea 
urchins is adequately shown in the photographs 
appended to Ikeda’s paper on the host sea 
urchin (1939: pi. 7,8). 
The specimens are very small, conical, white, 
and tinged with some pink or light reddish- 
purple transverse stripes. The wall is provided 
with prominent ribs on each compartment, the 
carina and latera having two strong ribs, the 
carinolatera a single one, and the rostrum two. 
The interval between the ribs is broadest and 
deepest in the lateral compartments. The radii 
are wide, transversely striped, and their oblique 
summits are usually ribbed because of the up- 
turned, prominent growth lines. The alae have 
straight, smooth, and nearly level summits. The 
orifice is wide and quadrangular. 
The opercular valves differ somewhat from 
