Alpheid Shrimp, X: Fiji, Tonga, Samoa — Banner and Banner 
153 
eyes to tip. Supracorneal teeth short, triangular, 
reaching about two-thirds the visible length of 
cornea; extracorneal teeth longer, reaching be- 
yond cornea, almost to end of first antennular 
article. 
Antennular peduncle short, with visible part 
of first antennular article the longest, second and 
third articles subequal. Superior distal margins 
of first and second antennular articles bearing 
4 teeth. Stylocerite heavy and acute with tip 
reaching end of second antennular article. Sca- 
phocerite with outer margin straight and with 
broad squame reaching slightly beyond end of 
antennular peduncle; lateral spine only slightly 
longer than squame. Carpocerite thick and as 
long as antennular peduncle. Basicerite broad- 
ened, without spine. 
Mouthparts protrudent, with inflated labrum; 
incisor lobe of psalistome of mandible also ex- 
panded, dish-shaped with fine teeth and molar 
portion reduced. 
Chelae similar in form, but with large chela 
1.3 times the length of the small chela. Large 
chela about 1.5 times as long as broad, with 
fingers occupying the distal third. Inner face 
convex, outer face only slightly convex, distal 
portion of superior margin flattened, leaflike, 
and bearing strong, forward-directed papillae 
from middle of chela to dactylar articulation, 
each papilla bearing one heavy seta. Outer and 
inner face without papillae. Lower margin op- 
posite dactylar articulation flattened, leaflike, 
and bearing six setiferous papillae similar to 
those of upper margin. Outer and inner faces 
smooth. Dactylus heavy, curved, with tip cross- 
ing at fixed finger; without papillae but with 
fine setae. Ischium heavy, about half as long as 
merus, bearing six to eight movable spines on 
both the inferior and superior margin, with 
three final spines on either margin on distal 
shoulder. Merus unarmed, 1.7 times as long as 
broad at its widest point, flattened where it joins 
the ischium but inflated, almost cylindrical in 
section, at about two-thirds of its length and 
most narrow where it joins the carpus. Carpus 
1.3 times as long as merus, proximally very thin 
and narrow, and curved to admit flexure, distally 
greatly expanded. Inner side excavate with leaf- 
like projections to encompass basal portion of 
palm where joint is flexed. Small cheliped of 
similar configuration but with fewer setae, 
ischium with fewer spines. 
Merus of second leg 1.3 times longer than 
ischium. Carpus of four articles with ratio of 
10:6:3:7. 
Third leg robust. Ischium unarmed, 0.5 length 
of merus. Merus inermous, 2.5 times as long as 
broad; carpus 0.5 as long as merus, armed with 
single strong movable spine on distal end of in- 
ferior margin. Propodus 1.3 times as long as 
merus. Inferior margin bearing four pairs of 
movable spines, and two strong spines on the 
inferior side of the dactylar articulation. Dac- 
tylus simple, curved, 0.4 as long as merus. 
Telson slender, 3-5 times as long as broad at 
its posterior margin. Anterior margin twice as 
wide as posterior margin. Posterior margin ex- 
tended and rounded. 
DISCUSSION: In the key published in the re- 
vision of the genus At h anas (Banner and Ban- 
ner, 1960:138) this species shows a relation- 
ship to Athanas verrucosus Banner and Banner, 
At h anas borradailei ( Coutiere ) , and Athanas 
ghardaquensis ( Ramadan ) . It may be separated 
from A. verrucosus by a series of characteristics, 
probably the most reliable being the four ar- 
ticles of the carpus of the second leg, and the 
lack of papillae on the face of the palm of the 
chelae. A difference is also found in the greater 
breadth of the large chela of A. verrucosus, 
which is 2.2 times as long as broad, while in 
A. Polynesia it is 1.5 times as long. This species 
is similar in frontal region and carpus of the 
second leg to A. borradailei (Coutiere) (1905: 
86 1) but the chelae of A. borradailei are more 
slender and without papillae, and the ischia and 
meri of the chelipeds are without spines. A . 
ghardaquensis (Ramadan) (1936:15) maybe 
separated from this species by its lack of mar- 
ginal papillae on the chelae, and by the fact that 
in A. ghardaquensis the chelae are symmetrical. 
SALMONEUS Holthuis 
Salmoneus tricristata Banner 
Salmoneus tricristata Banner, 1959. Pacific 
Sci. 13(2): 131, fig- T 
LOCALITY: Samoa: 2 specimens from BAS 
10 . 
DISCUSSION: The larger female of these two 
