848 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Fig. 10 . — Leptodius molo- 
kaiensis, larger chela of 
type male, x 2§. 
Chelipeds very rough; wrist nodulous and granulous, a few spinules at inner angle; granules of the 
hand very uneven and arranged in irregular transverse series, the ridges of the fingers marked by 
coarse granules. Fingers shorter than in L. exaratus, the dactylus strongly hooked and reaching 
beyond the pollex. Tips of fingers broadly hollowed, a subterminal tuft of hair. Index with a large 
tooth at its middle, and a smaller one on the proximal side of the first; dac- 
tylus with two or three teeth on basal half. Color of index curving mod- 
erately back on palm. Merus joints of legs armed with a row of short spines 
above and sharp granules below on the proximal two-thirds. Last three 
joints granulous, their margins sharply spinulous. 
Dimensions. — Male, length 10, width 14.7 mm.; female, length 7.9, width 
11 mm. 
Type locality. — South coast of Molokai, 43 to 66 fathoms, station 3850; 1 
male, 1 egg-bearing female (Cat. No. 29492). 
Stimpson, in his unpublished report on the Crustacea of the North Pacific 
Exploring Expedition, describes and figures many forms which he considers varieties of Leptodius 
exaratus. Our species approaches some of these in the form of the carapace, but is much rougher; 
none of his species have the meropodites armed with spines. 
Leptodius nudipes (Dana). 
(PI. ix, fig. 3.) 
Xantho ( Leptodius ) nudipes Alcock, Jour. Asiat. Soc. Bengal, LXVII, 1898, 121, and synonymy. 
Hawaiian Islands, A. Garrett, 2 males, in Museum of Comparative Zoology. 
Carapace deeply areolate. The posterior accessory denticle of the last antero-lateral tooth has 
the appearance of being on the postero-lateral margin. An oblique groove runs to the middle of the 
postero-lateral margin. 
Front deeply four-lobed, a distinct median V. 
The proximal half of the anterior margin of the merus of the ambulatory legs is hairy, as are 
both margins of the inner surface of the arm of the cheliped. 
Length of male 11, width 16.5 mm. 
Leptodius gracilis (Dana). 
(PI. ix, fig. 2.) 
Chlorodius gracilis Dana, Crust. U. S. Expl. Exped., I, 210, 1852; pi. xi, fig. 13, 1855. 
Oahu, H. Mann, 4 males, 2 females, in Museum of Comparative Zoology. 
Leptodius waialuanus, sp. nov. 
(PI. viii, fig. 9.) 
Also of the exaratus group, but approaching nearer X. sanguineus. 
Carapace narrower than in any of the allied species. Supplementary 
tooth wanting, although there is a short granulated ridge, and its comple- 
mentary groove, leading out to the point where the supplementary tooth 
exists in L. sanguineus. Carapace rather convex, almost smooth posteriorly, 
irregularly pitted, very finely granulated. Antero-lateral teeth angular, 
hooked forward, not much projecting, the fifth retreating. Front advanced, 
median emargination minute, lobes slightly concave, but not subdivided. 
Inner orbital angles very broad, orbits correspondingly narrow. Cheliped 
(the left only is present) much as in L. sanguineus, but fingers shorter; three superior crests of 
movable finger each with a lobe at base. 
Length of female 10, width 13.8 mm. 
Waialua, Oahu, 1902, 1 female (Cat. No. 29506). 
Fig. 11 . — Leptodius waia- 
luanus, chela of type fe- 
male, x 2$. 
