Hawaiian Crangonidae ■ — BANNER 
133 
Propodus of third legs 1.2 Propodus of third legs 1.5 
times length of carpus times length of carpus 
Dactylus of third legs not Dactylus of third legs spi- 
spiniform, flattened on niform, not flattened 
inferior face 
On almost ail other points the two species are 
similar , so similar in fact that, with only one 
or two of the differences listed above, the 
Hawaiian form could be considered at most 
a variety. However, the great difference in the 
dactylus of the third leg reinforced with the 
other more minor differences leaves little 
doubt but that this species is valid. 
The differences between this species and 
C rapax, its closest relative locally, are dis- 
cussed under that species. 
distribution: In addition to the type 
series listed above, two specimens were col- 
lected from Kaneohe Bay, Oahu, where they 
v/ere found underneath coral heads on shallow 
sand flats, less than a foot deep at low tide. 
In many of the areas of silty sand in Kaneohe 
Bay there are numerous burrows evidently 
made by this species or by C. rapax (Fabr.). 
Some of these burrows are also inhabited by 
specimens of a small fish. Unfortunately, I 
was unable to collect either the crangonids or 
the fish, as the burrows penetrated through 
the veneer of sand into the underlying con- 
solidated coral of the reef. It was also im- 
practical to seize the animals in their burrows, 
to entice them out, or to drive them out. The 
two that were collected evidently had burrows 
that led under large loose coral heads lying 
on the surface of the sand; when the heads 
were moved the shrimp were caught in a dip 
net. 
Edwardsi Group 
Crangon leptochims (CoutiUe) 
Fig. 48 a-h 
Alpheus leptochims Coutiere, Fauna and Geog. 
Maid, and Laccad. 2(4): 914-916, pi. 87, 
figs. 54-54e, 1906. 
DESCRIPTION: Rostrum triangular, about 
1.5 times as long as broad, tip reaching almost 
to end of first antennular article. Rostral carina 
rounded, extending slightly posterior of eyes. 
Orbital hoods somewhat inflated, rounded 
anteriorly, demarked from base of rostrum by 
shallow rounded grooves. Anterior margin of 
carapace somewhat emarginate between orbi- 
tal hoods and rostral base. 
Visible portion of first antennular article 
as long as second article; second article about 
1.8 times as long as broad; third article about 
0.7 length of second. Tip of spine of stylo- 
cerite reaching to end of first article. 
Lateral spine of basicerite reaching to tip 
of rostrum. Scaphocerite strong, lateral mar- 
gin slightly concave, tip reaching consider- 
ably beyond end of antennular peduncle. 
Carpocerite longer than antennular peduncle, 
reaching to end of squamous portion of 
scaphocerite. 
Large chela rather slender, 3 times as long 
as broad, compressed, with grooves and de- 
pressions. Transverse groove on superior 
margin, with distal edge rounded and prox- 
imal edge overhanging floor of groove; 
groove expanding on external face to elon- 
gate, narrow, triangular depression with poor- 
ly demarked margins; on internal face con- 
tinuous with similar but less extensive 
depressed area. On inferior margin, opposite 
groove on superior margin, notch with abrupt 
proximal edge and gradual distal edge; on 
external face notch continues, well-defined, 
for 0.3 height of face; on internal face notch 
poorly defined and continuing for only 0.25 
of height. Finger of usual form, less than 0.3 
length of entire chela. Merus 3 times as long 
as broad, with superior margin ending in 
obtuse angle; inferior internal margin with 2 
movable spines and distal tooth. 
Small chela of female almost 5 times as long 
as broad, without sculpturing, fingers occupy- 
ing almost 0.5 length of chela. Articulation 
of dactylus flanked by small obtuse projection 
on inner side. Carpus with small tooth pro- 
jecting over propodus. Merus 4.5 times as 
long as broad, almost 0.3 longer than merus 
of large chela, with 3 movable spines and sub- 
terminal tooth on inferior internal margin. 
