Alpheid Shrimp, X: Fiji, Tonga, Samoa — BANNER and Banner 
155 
specimens has both chelae intact; they appear to 
be identical with those of .S', sihogae (de Man). 
The chelae will be described in a later paper of 
this series. 
Salmoneus sibogae (de Man) 
For full citation see Banner and Banner 
(1964:86). 
LOCALITIES: Fiji: 2 specimens from BF 2; 2, 
BF 4; 1, BF 5; 1, BF 12; 1, BF 18; 2, BF 19; 2, 
BF 20. 
DISCUSSION: These specimens and some from 
other localities, especially Eniwetok, were ex- 
amined closely to determine the extent of varia- 
tion in certain of the taxonomically important 
characteristics. The telson is quite uniform, and 
in all normal specimens the notch is trapezi- 
form; in those few specimens where the notch 
is not of this shape, the telson is definitely mal- 
formed, with poorly developed posterolateral 
lobes and lacking in some cases the terminal 
spines on the malformed side. The rostrum, 
however, is quite variable. The tip may reach 
from the end of the second antennular article to 
the end of the third. The breadth usually is 
equal to the length ( the triangle measured with 
the baseline at the most posterior portion of the 
notch between the rostrum and the orbital teeth ) , 
and its sides are concave; but in some specimens 
the length is up to 1.5 times the breadth of the 
base. The orbital teeth are somewhat variable, 
but never reach to the end of the first antennular 
article. The stylocerite, scaphocerite, and car- 
pocerite are surprisingly uniform, with the 
stylocerite reaching to the middle of the third 
antennular article, the scaphocerite reaching to 
or slightly beyond the end of the third anten- 
nular article, and the carpocerite reaching only 
to the middle of the second antennular article. 
Inasmuch as the stylocerite remains rather con- 
stant and the rostrum variable, in some speci- 
mens the stylocerite is longer, and in others 
shorter, than the rostrum. No variation was 
noted in the thoracic legs, although they were 
not studied closely. There is no marked sexual 
dimorphism in the form and size of the large 
or the small chela. 
This species is closely related to S. latirostris 
( Coutiere ) , S. hilarula ( de Man ) , and S. mau- 
iensis ( Edmondson ) . Whether it is distinct from 
Coutiere’s inadequately described and figured 
specimen cannot be ascertained until the type 
specimen is redescribed. It is distinguished from 
S. hilarula by a longer scaphocerite, which in 
hilarula reaches only to the end of the second 
antennular article, and by different shape in the 
orbital teeth and different proportions in the 
third legs. S. mauiensis does not have the trape- 
ziform notch in the telson, but has instead a 
shallow to almost nonexistent ”v” that reaches 
from corner to corner. 
Salmoneus tafaongae sp. nov. 
TYPE SPECIMEN: A fragmentary ovigerous 
female, carapace length 3.2 mm, total length 
8.8 mm, collected on outer portion of fring- 
ing reef, shoreward of surf zone, about one ft 
below low water, 3 miles east of Apia, Upolu, 
Western Samoa; collected by A. H. Banner, 
24 April 1954. 
DESCRIPTION : Body slender and relatively 
elongate for shrimp of this genus. Rostrum 
triangular, elongate, 3 times as long as broad 
at base (base considered as at end of straighter 
portion of margins ) ; margins with only slight 
concavity anterior to eyes; tip acute, reaching 
almost to end of antennular article, bearing 
small tooth. Supracorneal spines acute, up- 
turned, reaching half the length of visible 
portion of first antennular article. Corneas visi- 
ble dorsally between supracorneal spines and 
rostrum, and most of corneal hemisphere visi- 
ble laterally. Anterior carapace without trace of 
carinae or grooves. 
Antennular peduncle elongate, with second 
article about 1.3 times as long as broad, sub- 
equal in length to third article and shorter than 
first. Stylocerite acute, reaching to end of second 
antennular article. Secondary ramus of upper 
flagellum short and bearing numerous heavy 
setae. Basicerite bearing slight superior and 
stronger inferior teeth. Scaphocerite not reach- 
ing to end of third antennular article; squamous 
portion broadly rounded, slightly exceeding lat- 
eral spine in length. Carpocerite short, not 
reaching to middle of second antennular article. 
Large chela lacking. Small chela with form 
typical of small chelae in Salmoneus, with ratio 
