BRACHYITRA AND MA CRURA OF HAWAIIAN ISLANDS. 
849 
Xanthodius biunguis, sp. nov. 
(PI. viii, fig. 10.) 
Nearest to X. cristatus (Borradaile). 0 
Upper surface thinly coated with coarse tubular hairs, which only partly disguise the markings on 
the carapace. Gastric region and its subdivisions plainly marked ; 
branchio-hepatic area indistinctly subdivided. Carapace granu- 
late all over. 
Front bent down, lobes convex, granulate, outer angles well 
marked and separated by a rectangular notch from the much 
thickened and granulate orbital rim. No superior orbital notches; 
inferior notch very small, terminating a deep fissure. Four low 
side teeth, or lobes, with granulated edge, the first fused with the 
orbital tooth. Inner lower angle of orbit prominent, but less 
advanced than the superior angle. 
A low, blunt ridge on the endostome reaches the front edge 
of the mouth. 
Chelipeds unequal, granulate all over except on inner face of 
arm and lower face of palm; upper and inner margins of arm 
hairy; inner tooth of wrist blunt; granules of palm large, con- 
tinued on base of fingers. Fingers grooved, gaping, broadly 
hoofed at tips, a large tooth at middle of larger pollex, another 
at base of dactylus. 
Legs obscurely granulate, long-hairy above; dactyls two- 
tipped; a curved spine a little stouter than the horny nail is situated just behind or below the latter. 
Length of female type 5.4, width 7.8, fronto-orbital width 5.5 mm. 
Distribution . — Honolulu coral reef, July 22, 1901 (type locality), Cat; No. 25335; Honolulu, 1891; 
Kailua, August, 1901. 
Medaeus ornatus Dana. 
Fig. 12 . — Xanthodius biunguis, a, Dorsal 
view of type female, x 2f. 6, Chela of 
male, Kailua, x 3§. 
(PI. ix, fig. 5.) 
Medxus ornatus Dana, Crust. U. S. Expl. Exped., I, 182, 1852; pi. ix, fig. 1, 1855. 
Distribution . — South coast of Molokai Island, 23 to 73 fathoms, stations 3847, 3848, 3850; Auau 
Channel, 13 to 43 fathoms, stations 3871, 3872, 3874, 3876. 
Lahaina, Maui (Dana); Hawaiian Islands (Miers). 
The largest male (station 3872) measures 13.8- mm. long, 20.9 broad. In the adult males the 
fingers of the larger chela are truncate at the tip, the point being turned abruptly inward; the truncate 
surface is slightly hollowed out. The black color of the immovable finger extends well back on the 
palm in both chelae of the male, reaching below nearly to the wrist. 
Medaeus simplex A. Milne Edwards. 
(PI. ix, fig. 10.) 
Wedseus simplex A. Milne Edwards, Jour. Mus. Godeffroy, IV, 1873, 79 [3]. 
Hilo, Hawaii, H. W. Henshaw, two specimens, male and female, the latter ovigerous, both larger 
than the type, the male measuring 13.4 by 20.2 mm., the female 11.2 by 17 mm. 
Cycloxanthops angustus, sp. nov. 
(PI. ix, fig. 6.) 
A narrow species, carapace three-fourths as long as wide; gastric region very convex from side to 
side, antero-lateral limb concave, edges of teeth upturned. Surface deeply areolated posteriorly as well 
as anteriorly, 2M, 3M, and 5L being especially well marked. Posterior margin beaded, in front of it 
a transverse ridge. Surface coarsely and unevenly granulate, short-pubescent. 
: Fauna and Geog. Maidive and Laccadive Arch., I, 252, 1902. 
