920 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family PONTONIID^. ' 
Harpilius depressus Stimpson. 
(PI. xxiv, fig. 12.) 
Harpilius depressus Stimpson, Proc. Acad. Nat. Sci. Phila., XII, 1860, 38 [107]. 
Anchistia spinigera Lenz, Zool. Jahrb., Syst., XIY, 1901, 434 (l A. spinigera Ortmann). 
Honolulu, 1901; reef in front of Honolulu, 1901; Waikiki Beach, 1901. 
Island of Hawaii among madrepores (Stimpson). Laysan (Lenz). 
Rostral formula in our specimens Rostrum deeper than in Savigny’s figure of H. beaupresi 
Audouin. Telson with either one or two paiis of dorsal aculei. 
The antepenult joint of the third maxilliped is much narrower than in H. lutescens Dana; the 
terminal joint of the second maxilliped is suboval and articulated at the 
end of the penult joint. In these respects, it approaches the genus Anchis- 
tus Borradaile. 
Corallioearis quadridentata, sp. nov. 
(PL xxiv, fig. 1.) 
Body subcylindrical. Rostrum laterally compressed, narrow, reaching 
just to end of first antennular segment, directed slightly downward, armed 
above with four teeth, below entire. A strong spine at outer angle of orbit. Eyes stout, reaching 
about three-fourths length of rostrum. Second and third antennular segments very short, together 
shorter than the first, which has an outer distal spine. Antennal scale reaching to end of - second 
antennular segment, blade rounded and fringed with hair, outer- spine small and less advanced; 
peduncle reaching to end of first antennular segment; flagellum at least half as long as body. 
Antepenult segment of third maxilliped only a little wider than the following joints and nearly as 
long as their combined length. First pair of feet as long as antennules; carpus 
equal in length to merus; propodus two-thirds of carpus; palm and fingers sub- 
equal. Second pair very unequal, but similar in form. Right or larger nearly as 
long as body; carpus very short, triangulate; propodus very stout, palm twice as 
long as high, crossed transversely by very fine rugae; fingers about one-third as Fig 69 .— Corallioearis 
long as palm; pollex curved, with two basal teeth on prehensile edge; dactyl quadridentata Awe, 
strongly enlarged distally, a deep sinus near the base. Left cheliped only about rostrum, x i"|. 
half as long as body and correspondingly narrow; dactylus more orbicular. Dac- 
tyli of last three pairs short, curved, thickened at base, and with an accessory spinule. Telson with 
two pairs of lateral spinules. 
A small species, measuring 10 mm. long. 
One specimen only from Auau Channel, 28 to 43 fathoms, station 3876 (Cat. No. 30552). 
This species comes nearest to C. tridentata Miers, but the eyes are longer, the palm is not carinated 
below, and the pollex is dentate. . 
Corallioearis truncata, sp. nov. 
(PI. xxiv, fig. 2.) 
Body shaped as in the preceding ( C. quadridentata) . Rostrum half as long as carapace, reaching 
barely to end of antennular peduncle; inclined slightly downward; superior crest armed with six small 
spines, the first and second separated by the greatest distance; extremity truncate, armed with three 
small spines, one of which is the terminal one of the upper margin; in dorsal view rostrum broad at 
base, flanked on either side by a strong supra-ocular spine. A strong antennal spine also. Eyes very 
stout, cylindrical. Second and third joints of antennular peduncle very short, subequal, and together 
not so long as the first; flagella short. Antennal peduncle reaching end of first antennular segment; 
scale extending with about one-third its length beyond antennular peduncle, very broad, outer margin 
straight, inner very convex, antero-external spine very slender and exceeding the blade. Two last 
joints of third maxilliped distinctly narrower than antepenult joint, and together about equaling the 
Pig. 68 . — Harpilius depressus, 
Honolulu, 1901, rostrum, 
