822 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
by a distance equal only to half the width of one eye, while in R. orientalis the eyes are separated by 
a distance equal to one-third the width of the head; in the narrower and more elongate body; in having 
the two branches of the uropoda of equal length and width, while in R. orientalis the outer branch is 
narrower and shorter than the inner branch; in the shorter basal joint of the uropoda, it being equal 
to half the length of the inner branch, while in R. orientalis the basal joint extends almost to the 
posterior extremity of the inner branch; and in the narrower terminal abdominal segment. 
Family CYMOTHOIDtE. 
Cymothoa recta Dana. 
Cymothoa recta Dana, U. S. Expl. Exp. Crustacea, xiv, pp. 751-752, pi. xlix, fig. 13 a~c. 
Locality: Puako Bay, Hawaii. 
Dana’s specimens were obtained at Hilo, Hawaii, by Dr. C. Pickering. 
Only one adult specimen was obtained, but a large number of young males (fig. 3), which are 
probably the young of this species, were taken from the following 
localities: Between Kauai Island and Modu Maru or Bird Island; 
north coast of Molokai Island; south coast of Oahu Island. Depth, 
6-2 to 299 fathoms. These young specimens are probably at a stage 
somewhat later than the young of the first and second stages de- 
scribed by Schioedte & Meinert« for C. oestrum Linn, and C. eximia, 
because all seven pairs of legs are present. The-pleopods, uropods, 
and terminal segment are, however, fringed with hairs, and the first 
and second antennae are very long, the first pair reaching the ex- 
tremity of the first thoracic segment and composed each of ten 
joints, the second pair extending to the posterior margin of the third 
thoracic segment and composed each of 16 long joints. The eyes are 
large and post-laterally situated, and the frontal margin of the head 
is well rounded. The antero-lateral angles of the first thoracic seg- 
ment are not produced along the sides of the head as in the adult. 
ONISCOIDEA. 
Family LIGIID^. 
Ligia hawaiensis Dana. 
Lygia hawaiensis, Dana, U. S. Exp], Exp., Crustacea, part 2, vol. xiv, pp. 740-741, 
pi. xlix, fig. 4 a-e. 
Locality: Pearl Harbor. 
A single specimen, without uropods, is referred to the above 
species described by .Dana from the islands Oahu and Kauai in the Hawaiian Archipelago. The 
specimen differs from the description in having shorter antennae, which do not extend beyond the 
fifth thoracic segment. Difference in sex may account for this, as it has been shown that in this 
genus the antennae of the females are shorter than those of the males. 
Family 0NISCID£. 
Porcellio laevis Latreille. 
Porcellio Isevis Latreille, Hist. Crust. Ins., vii, p. 46. Leach, Edinb. Encycl., vii, p. 406. Milne-Ed wards, Hist. Nat, des 
Crust., in, p. 169. Budde-Lund, Nat. Tidsskrift, (3) vii, p. 236; Crust. Isop. Terrestria, 1885, pp. 138-141. (See 
Budde-Lund for further synonymy.) 
Locality: Aiea, Oahu. 
a Naturhistorisk Tidsskrift, (3), xiv, 1883-84, pp. 276-278 and 281-282, pi. viii, fig. 10-13, pi. ix, fig. 11. 
recta, x 12. 
