Hawaiian Crangonidae — BANNER 
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rounded vertical keel. Area between orbital 
hoods and narrow orbitorostral furrow flat- 
tened; anterior margin arcuate. 
Antennular peduncle with first article 
slightly shorter than second, correspondingly 
longer than third; second article almost twice 
as long as broad. Stylocerite short and broad, 
lateral spine reaching end of first antennular 
article. Lateral spine of basicerite well devel- 
oped, shorter than stylocerite. Carpocerite 
reaching end of antennular peduncle, ex- 
ceeded by scaphocerite. Scaphocerite with lat- 
eral spine dominant, squamous portion re- 
duced; lateral margins concave. 
Large chela subcylindrical, almost as broad 
as high, about 3 times as long as broad, taper- 
ing distally; surface without sculpture except 
for transverse groove proximad of articulation 
of dactylus; chela sparsely hirsute on upper 
and inner surfaces. Dactylus about 0.4 length 
of chela, strong, with margin arcuate. Merus 
about twice as long as broad, about 0.25 as 
long as chela; superior distal margin project- 
ing as acute tooth, inferior internal margin 
with tooth distally. Large chela of female sim- 
ilar in form but relatively much smaller. 
Small chela of male 0.8 as long as carapace, 
subcylindrical, tapering, 3 times as long as 
broad, without sculpturing. Fingers slightly 
over 0.3 length of whole chela, expanded, 
about twice as long as broad, with dense fringe 
of setiferous bristles along both sides and over 
upper distal surface of finger ("balaeniceps- 
shaped,” see Fig. 43/^g). Carpus slightly 
elongate, 0.25 length of chela. Merus similar 
to that of large chela but without inferior in- 
ternal tooth. Small chela of female quite simi- 
lar in form but much smaller, without balae- 
niceps-shaped dactylus and with carpus rela- 
tively more elongate. 
Carpal articles of second legs with ratio 
10 : 10 : 3 : 4 : 5. 
Third legs with strong spine on ischium. 
Merus 3.5 times as long as broad, strong, 
curved, acute tooth subterminally on inferior 
margin. Carpus 0.5 as long as merus, inferior 
margin projecting as strong tooth. Propodus 
about 0.8 as long as merus, tapering, with 
about 20 movable spines of varying sizes. 
Dactylus simple, slightly curved, acute, as 
long as merus. 
Telson almost twice as long as broad, pos- 
terior margin 0.75 as broad as anterior section; 
lateral margins slightly concave. Posterior 
margin arcuate. Dorsal spines large, located 
about 0.3 and 0.7 of distance from articulation 
to tip. Length of larger pair of posterolateral 
spines 0.3 width of tip; smaller pair less than 
0.5 as long as longer pair. Margin between 
posterolateral spines with 9 somewhat irreg- 
ularly placed spinules. Distolateral margin of 
inner uropod with 4 large spines and 9 spi- 
nules. 
Large females up to 26 mm. long; no males 
exceeding 22 mm. of neotype. Color in life 
variable, but usually dark, olive green, reddish 
brown, etc., with pronounced irregular mot- 
tling of lighter color; specimens at times al- 
most transparent. 
DISCUSSION: All the specimens at hand were 
examined, but detailed studies on the varia- 
tion in proportions of the appendages were 
not made. However, variation was noted in 
three parts. First was in the anterior region of 
the carapace. Small specimens, 8 millimeters 
long or less, had a markedly different rostrum 
than the adults. In these specimens the ros- 
trum was narrow and of almost uniform taper, 
with its tip reaching almost to the end of the 
first antennular article; the rostral carina was 
well developed along the complete length; 
moreover, in these specimens the area between 
the rostrum and the orbital hoods extended 
relatively further forward, markedly surpass- 
ing the anterior margin of the orbital hoods. 
In specimens of increasing size, the condition 
of the rostrum approached that of adults. In 
mature specimens, variation was noticed es- 
pecially in the shape of the base of the ros- 
trum between the orbital hoods; in some it 
was as described above with the margins of 
the middle portion straight and almost paral- 
lel, whereas in others the curve from the edge 
of the carapace to the posterior limits was uni- 
