BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
911 
Egeon orientalis Henderson. 
(PI. xxm, fig. 3.) 
JEgeon orientalis Henderson, Trans. Linn. Soc. London (2), Zool., V, 1893, 446, pi. xl, figs. 16, 17. 
Distribution. — Vicinity of Kauai Island, 286 to 399 fathoms, station 4021, 2 females; vicinity of 
Modu Manu, 293 to 800 fathoms, station 4166, 1 female. 
The rostrum is distinctly bispinose, with a smaller spine either side at base. Median carina with 
five spines, of which the middle one is somewhat smaller. First or upper lateral carina 7-spined, 
second row 8 to 10-spined, lower row 6-spined, including the antero-lateral spine. The spines of the 
two lower rows diminish in size posteriorly, and the spines of the lowest row end halfway back on 
the carapace. 
The first, fifth, and sixth abdominal somites have each a pair of submedian carinse; the second, 
third, and fourth somites have each one median carina; the first, second, third, and fifth somites have 
two lateral carinse on each side; the fourth somite three lateral carinse on each side; the sixth somite 
one carina on each side. The six carinse of the first somite and the median carina of the second 
somite end anteriorly in a spine; the median carina of the fourth somite and the submedian pair of 
the fifth and sixth somites terminate posteriorly in a spine, while the submedian keels of the sixth 
somite have also a spine at their posterior third. 
Henderson describes the second, third, and fourth segments with only a single lateral keel; but 
his figure contradicts this. No rostral spines or teeth are shown in the figure. 
Egeon habereri (Doflein). 
Pontocaris habereri Doflein, Abh. math.-phys. Cl. k. bayer. Akad. Wiss., Miinchen, XXI, 1902, 
620, pi. i, figs. 4 and 5, text fig. A. 
Distribution. — Pailolo Channel, 127 to 138 fathoms, stations 3857 (1 male) 
and 3858 (1 female). 
Female larger than male; carapace 11.8 mm. long, abdomen about 
32 mm. 
The median carina of the male is four-toothed, of the female five- 
toothed. Besides the two main rostral teeth, there is a very small one on 
either side at the base. 
Of the antennular flagella in the female, the outer is not more than half 
as thick as the inner. 
Family RHYNCH0CINETID£. 
Rbynchocinetes rugulosus Stimpson. 
Rhynchocinetes rugulosus Stimpson, Proc. Phila. Acad. Nat. Sci., XII, 
1860, 36 [105], 
f Rhynchocinetes typus Borradaile, in Willey, Zool. Results New Britain, 
etc., pt. iv, 415, 1900. 
French Frigate Shoal, 17 to 17$ fathoms, station 3970, one small speci- 
men about 16 mm. long. 
Rostral formula Stimpson’s type from Port Jackson, Australia, was 2 inches long, and had 
three instead of four teeth near tip of rostrum above and twelve teeth below. The last two segments 
of the abdomen of the Hawaiian' specimens are noticeably longer than in the Chilean specimens of 
R. typus collected by the U. S. Exploring Expedition. Owing to the very great difference in the size, 
it is impossible to compare the r'ugse of the carapace. It may appear that the Hawaiian form represents 
an undescribed species. 
Fig. 64 . — Rhynchocinetes rug- 
ulosus. a, Carapace and 
antennal region, x 5§. b, 
Rostrum, x 4|. 
F. C. B. 1903, Pt. 3—10 
