BRACHYURA AND MA CRURA OF HAWAIIAN ISLANDS. 
837 
Dimensions. — Female type, length 7.9, width 10.3 mm. Female, Honolulu Reef, length 8.6, width 
11.4 mm. 
Record of specimens. — South coast of Oahu Island, 257 to 220 fathoms, station 3919; one female type 
(Cat. No. 29374). Honolulu Reef; one female. 
In the shape and convexity of the carapace this species approaches the West Indian P. obesus 
(A. Milne Edwards), but the antero-lateral borders are more oblique than in the latter. 
MANELLA, gen. nov. 
Differs from Palicus in having the legs of the last pair not different from, or abnormally smaller 
than, the others. Floor of orbit produced considerably beyond roof. Carapace broadest anteriorly. 
The genus Pleurophricus was instituted in 1873 by A. Milne Edwards (Jour. Mus. Godeffroy, IV, 84 
[8]) for a single species from Australia, P. cristatipes (op. cit., pi. i, figs. 6-6c) which no one has since 
examined. He places it among the Oxystomata near Orithyia. In 1879 Miers (Jour. Linn. Soc. 
London, Zool., XIV, 660) ranged it doubtfully in the Oxyrhyncha, in which he is followed by 
Haswell (Cat. Austral. Crust., 22, 1882). In 1887 de Man (see below) described a second species 
of the genus from Amboina, which he believed to be more nearly related to the Corystoidea than to 
any other group. It is this second species, P. spinipes, which is present in the Hawaiian collection, 
and I am confident that it should be placed in or near the Palicidse, as, were it not for the normal size 
and position of the posterior pair of legs, it might be ranged in the genus Palicus. The floor of the 
orbit is a little more advanced than in Palicus; otherwise the orbital region, the front, the antennal 
and buccal regions, the areolation of the carapace, the form of each joint of the first three pairs of legs, 
the character of sternum and abdomen are essentially those of Palicus. The shape of the carapace and 
chelipeds have less of the typical Palicus. The species of that genus which P. spinipes most resembles 
in shape is Palicus contractus Rathbun (Bull. Mus. Comp. Zool., XXXIX, 1902, 126, plate, figs. 7 and 
8) , in which the side margins converge from front to bach. 
I have separated generically de Man’s species from the type of Pleurophricus on account chiefly 
of the, legs. In P. cristatipes the legs are nearly of a size and the carpus is no longer than broad; while 
in Manella spinipes the first and fourth pairs of legs are much smaller than the second and third, and 
the carpus is elongate, with the characteristic shape of Palicus. In Pleurophricus the carapace is sub- 
circular and the chelipeds equal. If the male abdomen resembles that of Palicus and Manella, then 
the abdomen of Pleurophricus cristatipes represented in fig. 6c (op. cit. ) is that of a young female. 
This genus is dedicated to Dr. J. G. de Man, one of the most painstaking of 
carcinologists. 
Manella spinipes (de Man). 
(PI. vii, fig. 6.) 
Pleurophricus spinipes de Man, Arch. f. Naturg., LIII, 1887, 1, p. 344, pi. 
xv, fig. 1. 
Record of specimens. — South coast of Molokai Island, 23 to 24 fathoms, sta- 
tion 3847; Auau Channel, 28 to 43 fathoms, stations 3872 and 3876. 
De Man based the species on a single male, which had the front broken and lacked the right 
cheliped; the front is four-lobed, the lobes rounded, the middle pair lower and more advanced than 
the outer; median sinus deep U-shaped. The right chela is 1J times as high as the left in both sexes, 
fingers rather short and stout, and when shut leaving a small hiatus at base. In the adult male 
the greater part of inner surface of hand and fingers of both chelae is clothed with long hair; in the 
female and immature male this space is naked, but there is a small dark spot at the center. Besides 
the long hairs which lie on the upper surface of the last two joints of the legs, there are long hairs 
fringing the posterior edge of the merus, and in the last pair the anterior edge of the carpus. In the 
adult the seven segments of the abdomen are all well separated; in the immature the first to sixth 
segments, inclusive, may be fused. 
Dimensions. — Length of male (station 3847) 11.7, width 13.4 mm. 
Fig. 3 . — Manella spinipes, 
station 3847, larger 
chela of male, x 2|. 
