74 
PACIFIC SCIENCE, Vol. VII, January, 1953 
margin not continuous curve, with acute or- 
bital teeth that extend beyond tip of rostrum. 
Anterodorsal surface of carapace somewhat 
depressed; orbitorostral furrows very broad 
and shallow, not reaching as far posteriorly 
as posterior edge of eyes; anterior margin be- 
tween rostral base and base of orbital spines 
almost straight, forming angle of about 30° 
to transverse line of body, base of orbital 
spines advanced. 
Second article of antennular peduncle twice 
as long as broad, equal in length to visible por- 
tion of basal article, 1.3 times as long as distal 
article. Spine of stylocerite reaching to end of 
first article. Lateral spine of basicerite poorly 
developed but reaching to end of rostrum. 
Scaphocerite equal in length to antennular 
peduncle, slightly exceeded by carpocerite. 
Large chela heavy, 2.5 times as long as 
broad, compressed, 1.7 times as high as thick, 
with pronounced sculpturing distally. [Eor 
terminology of crests and grooves, see Fig. 
17^’.] Superior crest high and thin, continuing 
distally as strong acute tooth lying above dac- 
tylar articulation; soon merging with superior 
margin of palm proximal to transverse groove. 
Transverse groove broad and deep. Superior 
groove rather deep. Plaque crest heavy, 
rounded. Palmar groove deep. Inferior crest 
flattened with margins rounded, distally pro- 
jecting as strong, acute tooth below dactylar 
articulation. Inferior depression extensive and 
deep; shoulder slightly overhanging but with- 
out sharp margins. Dactylus strongly com- 
pressed, curved, distorted; only 0.2 length of 
entire chela because of distortion; chela ro- 
tated so finger closes horizontally almost 
across end of palm. Merus 3 times as long as 
broad, with superior margin terminated by 
acute tooth and inferior internal margin with 
2 spines and subterminal tooth. Ischium also 
with small spine. 
Small chela of female 3.5 times as long as 
broad, with fingers 0.5 of length. Articulation 
of dactylus flanked on each side by strong 
teeth. Fingers with tips bent at 90° and cross- 
ing. Merus with 3 spines and small distal 
tooth on inferior internal margin; ischium also 
with spine. [No male in the collection with 
the small chela intact, but according to Cou- 
tiere the male chela has the fingers broadened 
but not hooked.] 
Carpal articles of second legs with ratio 
10 : 7 : 3 : 4 : 5. 
Merus of third legs almost 6 times as long 
as broad, armed with strong subterminal 
tooth. Carpus 0.6 as long as merus, with small 
acute projection on superior distal margin; in- 
ferior margin with 4 movable spines, most 
distal one on inferior distal angle. Propodus 
0.7 as long as merus, with 7 spines on inferior 
margin but none distally. Dactylus 0.3 as long 
as propodus, biunguiculate with inferior un- 
guis shorter than superior. 
Telson twice as wide at base as at tip, 1.8 
times as long as broad at tip; lateral margins 
slightly convex; posterior margin arcuate. 
Largest specimen, a female, 10 mm. long; 
color in life not noted. 
DISCUSSION: The few specimens in the pres- 
ent collection show but little variation; in 
some the orbital teeth are slightly longer than 
in the specimen described; in some the lateral 
spine of the basicerite is better developed; the 
number of movable spines on the merus of 
the large chela is as great as five. The expected 
variation in the number of spines on the car- 
pus and propodus of the third legs was ob- 
served. One interesting specimen from the 
' 'Albatross” collection had its sole remaining 
second leg with the carpus divided into six 
rather than five articles; it appeared as if an 
extra article was inserted between the normal 
first and second articles. 
Allowing for the variation observed, these 
specimens agree well with the descriptions 
and figures of Coutiere. I believe that the dif- 
ference in the merus of the large chela, which 
was described as bearing on "son bord supero- 
interne [sic] . . . 7-8 dente ...” and which was 
shown as being serrate on the inferior internal 
margin, probably normally carried movable 
spinules as do the specimens described above. 
Otherwise there are no marked differences. 
