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PACIFIC SCIENCE, VoL VII, January, 1953 
but not merging with superior margin of 
palm. Palmar groove narrow and deep, reach- 
ing only about 0.3 length of palm. Inferior 
crest' heavy, rounded, terminating distally as 
strong, acute tooth below dactylar articula- 
tion. Inferior depression moderately devel- 
oped; shoulder heavy but rounded. Dactylus 
short, about 0.25 length of entire chela, ro- 
tated to close almost distally across end of 
chela. Chela moderately setose, with numer- 
ous groups of setae on inner face, superior 
and inferior margins, arid about edge of fin- 
gers. Merus less than twice as long as broad, 
without spines, with superior and inferior in- 
ternal margins slightly produced and rounded. 
Small chela somewhat heavy. Palm 1.5 
times as long as wide, distally with superior 
crest well developed and ending as projecting 
tooth which flanks articulation of dactylus. 
Fingers about equal in length to palm, dis- 
tally strongly hooked. Carpus with flat tooth 
on superior distal margin. Merus over twice 
as long as wide, without spines. 
Carpal articles of second legs with ratio 
10 : 9 : 4 : 4 : 7. 
Ischium of third legs with movable spine. 
Merus 3.3 times as long as wide, armed with 
strong but rounded tooth on inferior distal 
margin. Carpus with superior margin ending 
distally in acute dentate projection. Propodus 
with 5-6 sets of strong movable spines along 
inferior margin. Dactylus biunguiculate, with 
inferior tooth small and located in distal 0.25 
of article. 
Largest specimens in collection 20 mm. 
long. In life body mostly transparent with red 
and yellow chromatophores, legs with yellow 
and green chromatophores; superior surface 
of chelae olive drab. 
discussion: This species does not seem to 
exhibit the wide range of variation found in 
some. However, the following variations were 
noted: 
1. The length of the second antennular ar- 
ticle varied from 1.5 to 2.0 times the length of 
the visible portion of the first article; in most 
specimens about 1.7 or 1.8 times as long. 
2. In some specimens the scaphocerite was 
equal in length or slightly shorter than the 
antennular peduncle; in others it was slightly 
longer than the carpocerite. The carpocerite, 
usually markedly longer than the antennular 
peduncle, in a few cases was equal to it. 
3. In most specimens the small chela was 
markedly smaller than the large chela, as in 
the Qne drawn; in a few of the larger ones it 
was almost 0.8 the length of the large chela 
and similar in form to the small chela of C. 
deuteropus (Hilgendorf) (Eig. 22^). 
4. The second carpal article of the second 
legs was usually about 0.9 the length of the 
first but varied from 0.8 to 1.0 times as long. 
5. The merus of the third legs in a few 
specimens carried one or two weak spines, 
and the inferior tooth, usually acute with an 
angle of 60 or 70 degrees, was in some cases 
obtuse with an angle of more than 100 de- 
grees. 
The Hawaiian form of this species differs 
from Stimpson’s original description chiefly 
in the nature of the third and fourth legs, 
which he describes as, "Pedes tertii quartique 
. . . mero lato, inferne spinuloso et apicem 
unidentato. ..." In the Hawaiian forms, the 
few specimens with feeble spinules on the 
merus would hardly be called spinose. The 
specimen described by de Man (1911: 334) 
had one or two small movable spines on the 
carpus of the third legs which are lacking in 
the Hawaiian specimens. Finally, in de Man’s 
plates (pi. 14, figs. 65, 65a) the superior ridge 
of the large chela merges with the surface of 
the palm without any abrupt groove demark- 
ing it as in the Hawaiian form. These two 
characteristics of de Man’s specimen were not 
remarked upon in the original description. 
These differences are minor and probably in- 
significant. 
The three specimens listed below, which 
were collected by the "Albatross,” had been 
examined but not published upon by Cou- 
tiere. The Laysan specimen ("Albatross" Sta- 
tion 3962) was given a manuscript name for 
a new species. The specimen had recently 
