BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
905 
I think that this species should not be removed from S 'olenocera, the antennular flagella not differing 
essentially from those of S. siphonoceros (Philippi), a species which S. lucasii strongly resembles. In 
our largest specimen, 45 mm. long, the median carina is not continued behind the gastric region; 
dorsal spines 6—7, three of which stand behind the orbit (none behind the gastric region) , no branchi- 
ostegal spine, though the caiina leading to that point is strongly developed; eyes reaching beyond 
rostrum; the flagella of the antennula as long as the carapace less the rostrum, the larger one hollowed 
or longitudinally folded, and in the groove thus formed rests the more slender flagellum. 
The carina of the third abdominal segment is less sharp than on the succeeding segments. The 
telson is sharp-pointed (Bate describes it as truncate, but in his single specimen the tip was probably 
broken off), falling short considerably of the end of the inner branch of the tail-fan. 
The petasma is narrower than in S. siphonoceros, its distal half is trilobed on the ventral edge, the 
two most distal lobes ciliated. 
Length of carapace, male (station 3849), 14 mm., of abdomen 31 mm. 
The type specimen was 100 mm. long, which may account for the difference of some of its 
characters. 
Haliporus equalis Bate. 
Haliporus equalis Bate, Challenger Macrura, 285, pi. xli, fig. $, 1888. 
Haliporus xqualis Wood-Mason, Ann. Mag. Nat. Hist. (6), VIII, 1891, 277; Alcock, Desc. Cat. 
Indian Deep-Sea Crust. Dec. Macr. Anom., 23, 1901. 
Distribution. — Kaiwi Channel, 335 to 460 fathoms, stations 3470, 3471, 3474, 3475, 4106, 4107, 4108, 
4110, and 4112; vicinity of Kauai Island, 165 to 500 fathoms, stations 3988, 3989, 3997, 4022, 4028, and 
4029; vicinity of Modu Manu, 293 to 1,059 fathoms, stations 4153, 4157, and 4166. 
The median carina of the carapace is fairly distinct until near the posterior border; a low tubercle 
just in front of this border. 
In some of the specimens the telson equals or somewhat exceeds the andopod of the tail-fan. 
Haliporus modestus (Smith). 
(PI. xx, fig. 4.) 
Hymenopenseus modestus Smith, Proc. U. S. Nat. Mus., VIII, 1885, 183. 
Distribution. — South coast of Oahu Island, 183 to 280 fathoms, stations 3813 and 3920; vicinity of 
Laysan Island, 97 to 163 fathoms, stations 3938 and 3947; west coast of Hawaii Island, 198 to 147 
fathoms, station 4045; north coast of Maui Island, 143 to 220 fathoms, stations 4079 and 4081; Pailolo 
Channel, 122 to 143 fathoms, stations 4101, 4102, and 4103; northwest coast of Oahu Island, 154 to 251 
fathoms, stations 4114 and 4121. 
I have not seen the type of H. modestus (Smith) from off Delaware Bay, 156 fathoms, but the 
description agrees in all essentials with the Hawaiian specimens. 
The rostrum averages one-third the length of the carapace proper; of the seven dorsal spines, 
four may be on the carapace and three on the rostrum, or vice versa. 
The upper of the antennular flagella equals in length the carapace (including rostrum) and the 
first two abdominal somites; the lower one equals the carapace and rostrum. 
The antennal flagellum may attain three times the length of body. 
The inner lamella of the tail-fan, though shorter than the telson, reaches preceptibly beyond it. 
The leaves of the petasma are very broad, extremity oblique and three-lobed; a longitudinal plait 
divides the middle lobe. 
Dimensions. — The largest specimen, a female ( station 4101), measures 26.3 mm. on the carapace 
and 53.5 along the abdomen. 
