Hawaiian Crangonidae — Banner 
115 
and C clypeata (Coutiere), the diagnostic char- 
acteristic afforded by the ratio of the lengths 
of carpal articles may prove to be of some- 
what questionable worth. 
To separate this from the related Hawaiian 
species, see Table 5. 
DISTRIBUTION: On Oahu four specimens 
were from unrecorded localities, presumably 
from the shallow water at the reef surfaces; 
specific localities were Kaneohe Bay, under 
coral heads on sand flats about a foot deep at 
low tide, where the species was common; 
Waimanalo, 6 feet deep; Hanauma Bay, 20 
feet deep; Black Point, 2 feet deep; and Wai- 
kiki, 2 feet deep. On Maui, specimens were 
collected at Kalama Park, 3 and 8 feet deep; 
10 and 12 miles south of Lahaina, both at 6 
feet; and at Lahaina, 4 and 6 feet deep. There 
are no other records of the variety from the 
Hawaiian Islands. 
Crangon gracilipes (Stimpson) 
Fig. 41 a-i 
Alpheus gracilipes Stimpson, Acad. Nat. Sci. 
Phila., Proc. 12: 31, I860. 
DESCRIPTION: Rostrum narrow, triangular, 
acute, flattened dorsally, without carina, tip 
slightly depressed, reaching 0.7 of length of 
visible portion of first antennular article. Ros- 
trum separated from posterior portion of or- 
bital hoods by deep narrow depressions, more 
anteriorly by wide flattened areas with abrupt 
sides against both orbital hoods and rostrum, 
latter overhanging groove. Orbital hoods in- 
flated, large, with abrupt medial margin, pos- 
teriorly merging with carapace, anteriorly with 
dorsoventral keel. Anterior margin of orbito- 
rostral area concave.When seen in lateral view, 
anterior carapace without definite angle along 
dorsal surface at base of rostrum [as there is in 
C. percyi (Coutiere)], and without tubercle at 
this point. 
Antennular peduncle long and slender with 
second article over twice as long as broad, 
longer than visible portion of first article, over 
twice as long as third article. Stylocerite reach- 
ing to or slightly beyond end of first antennu- 
lar article. Scaphocerite long, with strong lat- 
eral spine about 1.1 times as long as squamous 
portion; outer margin somewhat concave; 
squamous portion somewhat reduced. Strong 
lateral spine of basicerite reaching tip of ros- 
trum. Scaphocerite slightly longer than anten- 
nular peduncle; tip of carpocerite reaching 
slightly beyond end of second antennular ar- 
ticle. Antennal flagellum about 1.5 times body 
length. 
Large chela subcylindrical, 1.3 times as high 
as broad, 3.7 times as long as high, tapering 
toward distal end. Palm with deep transverse 
groove proximal to articulation of dactylus. 
Palm, at articulation of dactylus, with narrow 
depression to accommodate high crest of dac- 
tylus when flexed. Dactylus 0.3 length of 
chela, compressed, strongly arcuate, longer 
than fixed finger. Merus about 2.5 times as 
long as broad; superior margin somewhat 
rounded but usually projecting as acute tooth 
(specimen drawn also with secondary tooth) ; 
inferior internal margin acute, with 2-4 spines 
and acute tooth distally. 
Small chela not sexually dimorphic, long 
and narrow, over 5 times as long as broad, 
fingers somewhat broadened, 0.7 length of 
palm. Dactylus with fringe of long setae run- 
ning longitudinally from near point of articu- 
lation over crown of article before apex. Small 
subacute tooth on propodus above articula- 
tion of dactylus. Merus usually with acute 
teeth distally on inferior internal and superior 
margins ; inferior internal margin usually with 
one to several spinules. 
Carpal articles of second legs with ratio 
10 : 10 : 4 : 5 : 6. 
Ischium of third legs with small movable 
spine; merus 8 times as long as broad, iner- 
mous; carpus 0.5 as long as merus, with tooth 
at inferior distal margin poorly developed; 
propodus almost as long as merus, with 9-11 
slender spines; dactylus simple, curved, 0.2 
length of merus. 
Telson 2.1 times as long as broad at base, 
tip 0.6 width of base. Lateral margins almost 
