BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
847 
Near L. pictor (Fabricius) =L. octodentatus (Milne Edwards), in which the anterior of the lateral 
teeth is below the level of the outer orbital fissure, the posterior tooth is broader, the hands are not 
externally carinate, and the legs are conspicuously carinate. 
Xantho lacunosus, sp. nov. 
(PL vm, fig. 6.) 
In form and areolation this species bears a striking resemblance to 
X. impressus (Lamarck).® Surface everywhere deeply pitted; on the palms 
the pits elongate, running transversely between irregular longitudinal 
ridges. Carapace a little narrower than in X. impressus, and front less 
deflexed, so that in dorsal view the true margin of the lobes is visible. 
Movable finger more strongly deflexed; meropodites of legs with a distinct 
though blunt superior crest, marked off by a groove. Sixth segment of 
abdomen of male broader, seventh more broadly rounded. Otherwise as 
in the related species. 
Dimensions.— A smaller species than X. impressus. Length of adult male, type, 18.4, width 30.5 
mm. Length of egg-bearing female 18.8, width 31.5 mm. 
Distribution. — Auau Channel, 32 to 65 fathoms, stations 3872, 3875, and 3876 (type locality). Cat. 
No. of type, 29588. 
Xantho bidentatus A. Milne Edwards. 
Xantho bidentatus Alcock, Jour. Asiatic Soc. Bengal, LX VII, 1898, 114. 
Hawaiian Islands (A. Milne Edwards, Miers). 
Xantho crassimanus A. Milne Edwards. 
Xantho (Leptodius) crassimanus Alcock, Jour. Asiatic Soc. Bengal, LXVII, 1898, 120. 
Reef in front of Honolulu; Waialua, Oahu. 
In the young the four teeth of the front are slightly developed. The surface of the carapace of 
both young and middle sized is everywhere conspicuously pitted. 
Leptodius exaratus (Milne Edwards). 
Xantho ( Leptodius ) exaratus Alcock, Jour. Asiatic Soc. Bengal, LXVII, 1898, 118, and synonymy. 
Honolulu; Pearl Harbor; Hilo, H. W. Henshaw. 
Hawaii (Stimpson). 
Leptodius sanguineus (Milne Edwards) . 
Xantho ( Leptodius ) sanguineus Alcock, Jour. Asiatic Soc. Bengal, LXVII, 1898, 119, and synonymy. 
Honolulu; Honolulu Reef; Waialua, Oahu; Hilo; Puako Bay and Kealakekua Bay, Hawaii; 
Napili Harbor, Maui, station 3881; Necker Island; Waikiki Beach, Waianse; Kailua. One specimen 
at Honolulu was taken from mouth of Gymnothorax laysana. “Under stones, high-water mark” 
Henshaw. 
Hawaiian Islands ( Randall, as Lagostoma nodosa; Streets). Oahu, Maui and Hilo (Dana); Hilo, 
1 female, U. S. Expl. Exped., in Museum of Comparative Zoology. Kannakakai, Molokai (Lenz). 
Both forms described by Dana under the names Chlorodius sanguineus and C. nodosus occur here. 
Leptodius molokaiensis, sp. nov. 
(PI. ix, fig. 1.) 
Closely allied to L. exaratus (Milne Edwards), but a much rougher species. The anterior two- 
thirds of the carapace in large part rugose, the rugosities composed of sharp granules. Lateral teeth 
very prominent, acuminate, sides concave and granulate; no supplementary tooth behind the fifth 
tooth. Lobes of front so deeply hollowed that a small distinct lobe is formed at the outer end. 
a Alcock, Jour. Asiat. Soc. Bengal, LXVII, 1898, 115. 
F. C. Bi 1903, Pt. 3—6 
Fig. 9 . — Xantho lacunosus, 
type, male, a, Chela, x If. 
6, Abdomen, x lg. 
