Hawaiian Crangonidae — Banner 
81 
gers varied from 0.3 to 0.5 the length of the 
palm, and the whole chela from less than 3.0 
to more than 3.5 times as long as high. Both 
large and small chelae may be glabrous. In all 
specimens the chela was without the depres- 
sions of the upper and lower margins that 
were found in C. gracilis var. simplex Banner. 
The teeth on the superior margin of the me- 
rus, not conspicuous even in large specimens, 
were scarcely visible in small specimens. The 
ratio of the first to the second article of the 
carpus of the second legs varied from 10 : 7 
to 10 : 8. The merus of the third leg varied 
from six to seven times as long as broad. 
The species is named in honor of Dr. C. H. 
Edmondson, Professor Emeritus of Zoology 
at the University of Hawaii and Curator of In- 
vertebrates at the Bernice P. Bishop Museum. 
relationship: This species appears to be 
very closely related to C gracilis and, there- 
fore, should belong to the Macrochirus 
Group. According to de Man’s key (1911), 
the characteristics of this species would leave 
it close to C. shearmei (Alcock and Anderson) , 
but obviously they are not closely related, be- 
cause C. shearmei^ a deep-sea species, has a 
minute rostrum, and the large chela lacks en- 
tirely the piston on the dactylus. 
This species shows many characters in com- 
mon with C. gracilis var. simplex Banner and C. 
latipes Banner; the three species are distin- 
guished in Table 3. 
DISTRIBUTION: Besides the type specimen 
from Kawela Bay, Oahu, the species has been 
collected on Oahu from Hanauma Bay at 
15 feet, off Kahala at 150 feet, and off Nana- 
TABLE 3 
Characteristics Differentiating Crangon latipes, C. gracilis var. simplex, and C. edmondsoni 
C. latipes 
C. gracilis var. simplex 
C. edmondsoni 
Maximum observed size 8.8 mm. 
Orbital teeth 0.3-0. 5 length of ros- 
trum; abruptly set off from orbital 
hoods; rostrum reaching end of 
first antennular article 
Large chela 2.2 times as long as 
broad; 2.2 times as broad as thick; 
without depressions on margins 
Merus of large cheliped with 2 or 
less spines on inferior internal 
margin; none elsewhere 
Carpal articles of second legs with 
ratio 10 : 8 : 3 : 3 : 14; second ar- 
article as broad as long 
Third legs 
Ischium with spine 
Merus 3-3.5 times as long as 
broad 
Propodus with 4-5 spines 
Dactylus 2.3 times as long as 
broad, distally strongly curved 
and abruptly tapering 
External spine of uropod never dark 
Coloration not noted 
Maximum observed size 18 mm. 
Orbital teeth usually 0.7 length of 
rostrum; abruptly set off from or- 
bital hoods; rostrum not reaching 
end of first antennular article 
Large chela 2.5 times as long as 
broad; 2.0 times as broad as thick; 
with depressions on upper and 
lower margins 
Merus of large cheliped with 4-6 
spines on inferior internal mar- 
gin; none elsewhere 
Carpal articles of second legs with 
ratio 10 : 6 : 3 : 3 : 6; second ar- 
ticle twice as long as broad 
Third legs 
Ischium unarmed 
Merus 4-5 times as long as broad 
Propodus with 6-8 spines 
Dactylus almost 4 times as long 
as broad, slightly curved and 
gradually tapering throughout 
length 
External spine of uropod usually 
brown to black 
Body with longitudinal stripes 
Maximum observed size 27 mm. 
Orbital teeth 0.5 length of rostrum; 
merging with orbital hoods on 
inner margin; rostrum reaching to 
or beyond end of first antennular 
article 
Large chela 3.5 times as long as 
broad; almost as broad as thick; 
without depressions on margins 
Merus of large cheliped with 7 spines 
on inferior internal margin; su- 
perior and inferior external mar- 
gins also spinose 
Carpal articles of second legs with 
ratio 10 : 7 : 4 : 4 : 6; second arti- 
cle over twice as long as broad 
Third legs 
Ischium with spine 
Merus 6-7 times as long as broad 
Propodus with 6 spines 
Dactylus 3 times as long as broad, 
slightly curved and gradually 
tapering throughout length, 
with notch on superior margin 
External spine of uropod never dark 
Body with transverse stripes 
