Hawaiian Crangonidae • — BANNER 
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guiculatus (1898^: 232, figs. 1-4), non 
S. hiungukulatus (Stimpson) (I860: 31). All 
previous records under the names Alpheus, or 
Synalpheus, hiungukulatus other than the orig- 
inal description should be attributed to S. cou- 
tierei, with the possible exception of the record 
made without description by Lenz in 1901 
wherein he reported the species from Laysan. 
However, it is impossible to know exactly 
upon which species he was reporting. 
DISTRIBUTION: As Stated above, the type 
locality was not designated. The neotype 
came from the deeper water along the west 
side of Hanauma Bay, Oahu; other specimens 
have been collected on Oahu off Waikiki in 
18 feet of water and off Nanakuli in 15 feet of 
water; at Maui off Kalama Park in 8 feet of 
water; and by R. W. Hiatt off Hawaii at Ha- 
lape, Kau Coast, near Keaoi Island, from Poc- 
tllopora meandrina Verrill in 25-30 feet and 
40-45 feet of water. 
Synalpheus charon (Heller) 
Fig. 11 a-k 
Alpheus charon Heller, K. Akad. Wiss. Wien, 
Sitzungsber. 44: 272, 1861. 
DESCRIPTION: Rostrum acute, narrow tri- 
angle with straight margins, tip reaching near- 
ly to end of first antennular article. Acute tip 
of orbital hoods reaching to near tip of ros- 
trum; outer margins of orbital hoods convex, 
inner margins slightly concave and separated 
from base of rostrum by shallow depression. 
Antennular peduncle with visible portion 
of first article longest, third slightly shorter 
than first, second correspondingly shorter 
than third; each article about as broad as long. 
Stylocerite well developed, with tip of lateral 
spine reaching almost to end of second an- 
tennular article. 
Lateral spine of scaphocerite slightly longer 
than squamous portion, approximately as 
long as antennular peduncle, and somewhat 
shorter than carpocerite. Superior angle of 
basicerite rounded, but lateral angle contin- 
ued into strong spine, almost equal in length 
to stylocerite. 
Large chela slightly compressed and twist- 
ed, with margins rounded and entire; shape 
somewhat inflated, 2.5 times as long as broad. 
Superiolateral edge of face of chela behind ar- 
ticulation of dactylus projecting over articu- 
lation as small rounded tubercle. Dactylus 
strongly arcuate, between 0.25 and 0.3 length 
of entire chela. Merus with superior distal 
margin projecting as acute tooth. Small chela 
likewise rounded and entire, dactylus slightly 
over 0.3 length of entire chela. Greatest diam- 
eter of carpus slightly larger than that of chela 
proper. Merus similar in form to large chela. 
Carpal articles of second legs with ratio 
10 : 3 : 3 : 3 : 5. 
Third and fourth legs with merus unarmed 
and 3 times as long as broad. Carpus pro- 
longed as rounded lobe on superior distal 
margin, armed with spine on inferior distal 
margin. Propodus curved and armed with 5 
or 6 slender spines. Inferior hook of dactylus 
thick and obtuse, with broad spoon-like ex- 
cavation on inferior margin. Distal hook, 
when seen in profile, longer than inferior 
hook, less than 0.3 as broad at base as ventral 
hook, tapering to acute tooth. All aspects of 
distal hook except straight profile showing 
basal half as broad and flat, paddle-like, with 
sudden constriction to narrow acute tip (Figs. 
\\h, i, the last is in such rotation that the 
acute tip is somewhat obscured) . 
Telson about as long as broad at base, with 
tip 0.5 width of base. Lateral margins anteri- 
orly concave, then posteriorly convex; tip 
arcuate. 
The largest specimen in the collection is a 
female 22 mm. long; most specimens are 
much smaller. The color is often a brilliant 
orange red. 
DISCUSSION: Only slight variation was 
noted in the specimens of this species in the 
collections at hand, possibly in part because 
of the small number of specimens available. 
Only one specimen showed a notable varia- 
