/Upheld Shrimp, X: Fiji, Tonga, Samoa — Banner and Banner 
151 
Fig. 5. Map of Tutuila showing collecting stations. 
long in the male, 3.5 times as long in the female; 
in these specimens it varies from about 2 times 
to more than 3-5 times as long as broad. The 
stylocerite is supposed to reach slightly beyond 
the distal margin of the proximal segment in 
A. johnsoni. In the Saipan specimens none 
reached to the end. In the others two did not 
reach to the end; four reached to the end; and 
five reached beyond the end of this article. The 
antennal scale in A. johnsoni , instead of extend- 
ing to the middle of the second antennular 
article, is supposed to reach to the distal fifth; 
in these specimens both conditions are found, 
as well as intergrading steps between. In the 
Saipan study a difference was noted in the 
length of the carpal articles of the second legs, 
with the second article 1.8 in A. gardineri, 1.2 
in A. johnsoni, and 1.3 times the length of the 
first article in the Saipan specimens; in these 
newer specimens the ratio has been found to 
vary from 1.2 to 1.5, but most specimens were 
lacking their second legs. The only remaining 
difference remarked by Chace is the occurrence 
of slight grooves in the carapace on either side 
of the rostrum which are present in A. gardi- 
neri alone. These grooves were not seen on any 
of these specimens, but because of the thin, 
transparent nature of the exoskeleton in this re- 
gion of the body it is very difficult even to see 
the rostrum. Moreover, since the exoskeleton is 
rather soft, these folds may actually be artifacts. 
In any case they do not appear to be a valid 
criterion for the separation of the two species. 
Unfortunately, there are not enough speci- 
mens from any one locality, and those we have 
are not complete enough to permit evaluation 
of their differences from other species of this 
genus described from the Indo-Pacific. ”A. spe- 
cies” of de Man probably is this species; more- 
over, this species is possibly a synonym of A. 
dolichognatha de Man, for the principal dif- 
ference between the two species is the form of 
the large chelae of the male and female, a dif- 
ference that may be the result of maturity. A. 
anacanthopus de Man and A. salomoni Coutiere 
appear to be distinct species. 
