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PACIFIC SCIENCE, Vol. VII, January, 1953 
straight, posterior margin arcuate. Dorsal 
spines moderately developed, 0.4 and 0.7 of 
distance from articulation to tip. Length of 
larger pair of terminal spines less than 0.5 
breadth of tip. Tip of telson and distolateral 
margin of inner uropod with series of small 
spinules. 
Length up to 22 mm. One specimen ob- 
served alive; dark, almost black, to unaided 
vision; color from greatly expanded blue and 
red chromatophores. Under microscope body 
mottled, with clear areas over eyes and on 
branchiostegites over third maxillipeds and 
elsewhere, and with darker areas like two "eye 
spots" on sides of abdomen. Antennules and 
antennae, second to fourth legs, and caudal 
fan bluish; fifth legs reddish; chelae slightly 
darker than body with pink cast at dactylar 
articulations and on tips of fingers. 
DISCUSSION: In a few specimens available 
for comparison no great variation was noted. 
The rostral length varied, with the tip reach- 
ing from 0.7 of the length of the first article 
of the antennular peduncle to beyond the end 
of the same article. In some cases the second 
antennular article was over twice the length of 
the first. The merus of the large chela varied 
as noted above; almost always the distal teeth 
were well developed; the same is true of the 
small chela. In some of the specimens the sec- 
ond carpal article of the second legs was 
slightly shorter than the first. The number of 
spines on the propodus of the third legs varied 
slightly. 
The only possible difference between this 
and the original description of Stimpson lies 
in the lateral spine of the basicerite which he 
specifies to be minute, whereas on all of these 
specimens it is large and well formed; how- 
ever, exactly what Stimpson meant by "mi- 
nute” is not known. The specimens also agree 
well with the specimens described by de Man 
(1911) from the southwest Pacific. 
To separate this from the related Hawaiian 
species, see Table 5. 
DISTRIBUTION: The few specimens available 
were collected from Kaneohe Bay, Kaaawa, 
and Waikiki, Oahu, and one from Maalaea, 
Maui; these were all without records as to 
depth, but presumably they were from shal- 
low water. Edmondson (1925) reported two 
specimens from Lisianski Island. The species 
has also been reported from the Hawaiian Is- 
lands by Coutiere. 
C. gracilipes occurs from the Red Sea through 
the Indian Ocean, the East Indies, and Japan, 
to Samoa, Tahiti, and Hawaii. The type local- 
ity is Tahiti. 
Crangon pugnax (Dana) 
Fig. 42 a-h 
Alpheus pugnax Dana, U. S. Explor. Exped. 
13: 554, pi. 32, figs. 6a-6h, 1852. 
Alpheus pugnax Dana, Acad. Nat. Sci. Phila., 
Proc. 6: 27, 1854. [Description without fig- 
ures.] 
As no specimens are available, the original 
description is given: 
Beak [rostrum] acute, narrow triangular, flat above, 
arising from between the bases of the eyes. Basal spine 
of outer antennae [of basicerite] small, basal scale 
[scaphocerite] longer than base [carpocerite]. Base [pe- 
duncle] of inner antennae shorter than scale of outer; 
basal spine [stylocerite] of inner antennae not shorter 
than the first joint, second joint short. Anterior feet 
unequal; larger hand long, smooth with rounded mar- 
gins, narrow emarginate above near articulation, fingers 
short (about one-third the length of hand), arm having 
a spine at both inner and outer apex. Feet of second 
pair long, first joint short, hardly half the second in 
length. Third and fourth pairs slender, third joint with 
an acute tooth at lower apex. 
At Lahaina, Island of Maui, Hawaiian group. 
Length, twelve lines. The beak from its base is very 
narrow, triangular, with straight sides, and there is no 
Carina prolonged down the back. Second joint of inner 
antennae hardly longer than first. Larger hand partly 
pubescent, somewhat fusiform, but little compressed, 
the finger turned out of plane of the hand; movable 
finger short, thin above, with arcuate dorsal margin. ! 
First joint of carpus of second pair of feet less than half 
the second; third shorter than fourth; fifth longer than 
fourth; hand as long as fourth and fifth. The fifth joint 
of third pair of legs long, very much longer than fourth, 
about eight set of spinules on its lower side, rather long ■ 
hairy above. 
Dana further states in his key: "Base of ^ 
rostrum rising between the eyes, deep sulci in \ 
carapace either side of rostrum. Orbital mar- : 
