BRACHYITRA AND MACRURA OF HAWAIIAN ISLANDS. 
913 
Hippolysmata paucidens,' sp. nov. 
(PI. xxiv, fig. 4.) 
A smaller species than the last. 
Rostral formula teeth smaller, two behind the orbit, the posterior one at the anterior third of 
the carapace or farther forward than in preceding species. Rostrum barely reaching end of first anten- 
nular segment. Acicle shorter than in H. acicula, not two-thirds length of carapace, rostrum excluded. 
Outer maxilliped exceeds acicle by three-fourths of its terminal joint. Twenty-three segments in 
carpus of second pair of feet. From H. vittata our species is distinguished by its shorter rostrum and 
fewer teeth. 
Dimensions. — Female type, length 18, length of carapace with rostrum 6.2, without rostrum 4.5, 
acicle (outer margin) 2.6 mm. 
Distribution. — Honolulu, 1901; Waikiki beach, August 14, 1901 (type locality); Laysan, May, 1902; 
10 specimens in all. Cat. No. of type, 25411. 
Spirontocaris marmorata (Olivier). 
Palxmon marmoratus Olivier, Encycl. M6th., Hist. Nat., Insectes, VIII, 665, 1811; atlas, XXIV, 
pi. 319, fig. 3, 1818. 
Alpheus marmoratus Lamarck, Hist. Anim. sans Vert., V, 205, 1818. 
Hippolyte marmoratus Milne Edwards, Hist. Nat. Crust., II, 379, pi. xxv, figs. 8 and 9, 1837. 
Hippolyte gibberosus Milne Edwards, Hist. Nat. Crust., II, 378, 1837. 
Hippolyte gibbosus Streets, Bull. U. S. Nat. Mus., No. 7, 1877, 119, and synonymy. 
Hippolyte gibberosa de Man, Arch. f. Natur., LIII, 1887, pt. 1, 533. 
Hippolyte marmorata de Man, loc. cit. 
Honolulu, 1901; Honolulu Reef, May 8, 1902; Oahu, Dr. T. H. Streets, U. S. Navy; Oahu, Sharp. 
Hawaiian Islands (Randall, Gibbes); 3 fragmentary specimens, T. Nuttall, collector, in Philadel- 
phia Academy of Natural Sciences. Hawaiian Islands (Dana). 
The difference between the species marmorata and gibberosa seems to consist solely in the length of 
the outer maxilliped, which I am inclined to think is dependent on maturity. In the limited series 
before me, specimens about 57 mm. long have the terminal joint of the maxilliped greatly elongate, 
exceeding the acicle by half its length. In a specimen 41.5 mm. long (Oahu), the maxillipeds reach 
just to end of acicle; in specimens about 22 mm. long, a little past middle of acicle. 
Specimens of a very young hippolytid were taken at the surface on the south coast of Oahu at 
stations 3812 and 3921. They average about 7 mm. in length and are probably the young of 
S. marmorata. 
Spirontocaris kauaiensis, sp. nov. 
(PI. xxiv, fig. 5.) 
Dorsal carina occupying three-fourths of the carapace, armed with three large spines, of which one 
is behind the orbit and two above- the eyes. The anterior one may stand in front of eyes. Rostrum 
one and two-thirds times as long as carapace, curved strongly upward, armed with 8 spines below; 
one subterminal above. A strong antennal spine. Pleon smooth; sixth more than twice as long as 
fifth segment and a little longer than telson, which has two pairs of lateral spinules. Eyes large. 
Second and third antennular segments very short, subequal; basal scale not exceeding first segment; 
peduncle reaching to middle of acicle; longer flagellum at least as long as pleon. Acicle just as long 
as carapace; antennal peduncle reaching to end of second antennular segment. The outer maxillipeds 
reach past middle of acicle; first pair of trunk legs, to end of antennal peduncle; second pair end half- 
way between tip of maxilliped and tip of scale. The outer maxilliped is provided with an exopod and 
epipod; the first and second trunk legs only with an epipod, all destitute of exopods. 
. Dimensions. — Female, length of carapace 8.7, rostrum 17, abdomen (telson excluded) 26 mm. 
Distribution . — Vicinity of Kauai Island, 55 to 362 fathoms, stations 3986 and 3998 (type locality); 
northwest coast of Oahu Island, 216 to 251 fathoms, station 4121; 4 specimens in all. Cat. No. of 
type, 30545. 
This species, by having three teeth at the base of the rostrum and in the elongate sixth segment 
of pleon, resembles S. tridens Rathbun, but that species has the rostrum shorter and more horizontal 
and the third abdominal segment subcarinate. 
