Hawaiian Crangonidae — BANNER 
103 
ported from shallow water at Laysan as C lay- 
sani and C hucephalus by Edmondson (1925). 
It has been dredged at the locations given in 
Table 4. 
The species has been reported from various 
locations in the Indian Ocean and from the 
Netherlands Indies. 
(?) Crangon paralcyone (Coutiere) 
A single 9 millimeter specimen, collected at 
Hanauma Bay, Oahu, in 20 feet of water, has 
been referred to this species with doubts. It 
agrees with C. paralcyone in the form of the 
rostrum and the orbital hoods, the stylocer- 
ites, the spine on the basicerite (on one side 
only; the spine is lacking on the other side), 
the relative lengths of the scaphocerite, car- 
pocerite, and antennular peduncle; somewhat 
in the form of the large and small chelipeds; 
in the relative lengths of the articles of the 
carpus of the second legs; and somewhat in 
the form and armature of the third legs. It dif- 
fers in the following points : the articles of the 
antennular peduncle are broader; the dactylus 
of the large chela is relatively shorter; the me- 
ral tooth of the third legs is reduced to a very 
short rounded protuberance, the spines of the 
propodus are much longer, almost comb-like 
in form. 
Most of these differences could be individ- 
ual differences in a variable species, the most 
notable being the dactylus of the large chela 
and the armature of the third legs which has 
the reduced tooth on the merus and the longer 
propodal spines. It is possible that these too 
may be individual differences, or they may be 
constant and adequate criteria to separate this 
specimen as a species. However, with only 
one such specimen, and with the parent spe- 
cies showing such marked variation, it is con- 
sidered advisable to place the specimen in C. 
paralcyone, with reservations. 
Crangon brevipes (Stimpson) 
Figs. 35 a-j, 36 a-e, yi 
Alpheus brevipes Stimpson, Acad, Nat. Sci. 
Phila., Proc. 12: 30, I860. 
NEOTYPE: A female 13.4 mm. long, col- 
lected from a head of coral in 10 feet of water 
off Nanakuli, Oahu. A male paraneotype 9-6 
mm. long has also been designated from the 
same locality (U.S.N.M. 93459). 
DESCRIPTION: Anterior portion of carapace 
with dorsal carina high and thin, ending 
abruptly at base of rostrum. Rostrum short, 
triangular, seldom reaching past anterior mar- 
gin of orbital hoods. Orbital hoods hemi- 
spherical, continued forward as short, sub- 
acute, subvertical keel that slants mesally 
toward ventral side; anterior margin of hoods 
almost vertical when seen in profile, reaching 
higher than rostral carina. Area between or- 
bital hoods and base of carina flattened, with 
anterior margin varying from concave to 
straight. Lateral margins of carapace with in- 
dentation between lateral margin of orbital 
hoods and covering of base of antennal pe- 
duncles. 
Second article of antennular peduncle from 
1.5 to 2.0 times as long as visible portion of 
first article; third article about as long as first. 
Stylocerite short, broad, lateral spine reaching 
only 0.8 length of visible portion of first an- 
tennular article. Basicerite unarmed. Scapho- 
cerite narrow, tapering, squamous portion 
about I.I-I.2 times as long as lateral spine; 
lateral margin slightly concave. Scaphocerite 
usually slightly longer than antennular pedun- 
cles and slightly shorter than carpocerite. 
Large chela without notches or grooves, 
subcylindrical, tapering. Dactylus heavy, be- 
tween 0.25 and 0.3 length of entire chela, 
strongly arched dorsally. Merus about 1.5 
times as long as broad, unarmed, distal end of 
superior margin rounded. Chela sexually di- 
morphic in both size and proportions, in fe- 
male noticeably shorter than carapace, in male 
longer than carapace, with relatively greater 
thickness and shorter fingers than in female. 
Small chela about 3 times as long as fingers, 
latter narrow and conical in both sexes; in 
male fingers about twice as long as broad, in 
female about 3 times as long as broad. Carpus 
0.3 length of chela. Merus 3 times as long as 
broad but otherwise similar to large chela. 
