12 
PACIFIC SCIENCE, Vol. VII, January, 1953 
Jousseaumea mauiensis Edmondson 
Fig. 2 a-h 
Jousseaumea mauiensis Edmondson, Bernice P. 
Bishop Mus., Occas. Papers 9(10): 5-7, fig. 
2a-g, 1930. 
DESCRIPTION: Rostrum nearly equilaterally 
triangular, with base arising anterior to cor- 
nea of eye and only slightly shorter than con- 
cave lateral margins; tip reaching to middle of 
third antennular article. Orbital teeth acute 
and about 0.2 to 0.25 as long as rostrum. Ros- 
trum with a rounded keel extending back to 
its base. Pterygostomial angle rounded. 
Antennular peduncle short and heavy, with 
third article longer than visible portion of 
either first or second article; second article al- 
most twice as broad as long. Stylocerite acute, 
reaching slightly beyond end of rostrum. Bi- 
furcation of outer flagellum occurring near 
base; secondary flagellum short. 
Antennal peduncle with basicerite bearing 
a poorly developed lateral tooth. Scaphocer- 
ite slightly longer than antennular peduncle, 
with squamous portion exceeding poorly de- 
veloped lateral spine in length. Carpocerite 
short and heavy, reaching almost to end of 
antennular peduncle. Flagellum large in diam- 
eter basally, only as long as carapace. 
Large chela 0.3 length of body, with basal 
articles almost as long as chela. Chela large, 
subcylindrical, with palm 1.3 to 1.5 times 
length of fingers. Fingers curved and com- 
pressed, with faces in opposition armed with 
4 large and 2 smaller exactly fitting teeth; 
tips curved, acute, and crossing each other. 
Merus flattened on side toward palm. Small 
chela about 0.25 length of larger chela, not 
swollen, and without teeth. 
Carpal articles of second legs with ratio 
10 : 2.6 : 1.6 : 1.6 : 3.3. 
Merus of third legs 3.5 times length of 
ischium, 1.3 times length of carpus, 0.75 times 
length of propodus, 2.7 times length of dac- 
tylus. Merus over 4 times as long as broad, 
unarmed; propodus bearing about 8 movable 
spines and about 6 shorter tufts of bristles; 
dactylus moderately heavy, curved, simple, 
with acute tip. 
Telson 1.5 times as long as broad at base; 
tip 0.4 as broad as base. Terminal emargina- 
tion 0.1 total length of telson, rounded and 
bearing 3 to 4 pairs of plumose setae. Both 
pairs of terminal spines almost as long as 
width of tip. 
DISCUSSION : (See discussion under J. hrevi- 
rostris) . 
DISTRIBUTION: The type specimen came 
from the island of Maui; additional specimens 
have been collected about Oahu at Hanauma 
Bay, Kahala Beach, off Waikiki Reef, off 
Nanakuli, and at Kawela Bay, at depths from 
the reef flat to about 20 feet. Edmondson 
(1946: 256) states that this species is commen- 
sally associated with a large polychaete of the 
genus Eurythoe. 
Jousseaumea brevirostris Edmondson 
Fig. 3 r-g 
Jousseaumea brevirostris Edmondson, Bernice 
P. Bishop Mus., Occas. Papers 9(10): 7-9, 
figs. 2a-e, 1930. 
DESCRIPTION : Carapace with dorsal keel for 
over 0.5 its length, continuous anteriorly with 
rostral carina. Rostrum triangular, reaching 
slightly beyond end of first antennular article. 
Eyes normally concealed by orbital hoods in 
dorsal and lateral view; orbital hoods contin- 
ued as small acute orbital teeth, teeth about 
0.3 length of rostrum. Area between base of 
orbital teeth and dorsal carina slightly con- 
cave. 
Antennular peduncle short and heavy, with 
visible portion of first and second articles sub- 
equal in length, about 1.5 times as long as 
broad. Heavy stylocerite with acute tip, reach- 
ing almost to end of second antennular arti- 
cle. Flagella short, with shorter branch of bi- 
furcated upper flagellum not as long as last 
2 antennular articles together. 
Basicerite heavy, bearing acute lateral tooth 
and short spiniform process (in lateral view) 
above articulation of scaphocerite. Scaphocer- 
