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Alpheid Shrimp, X: Fiji, Tonga, Samoa — Banner and Banner 
DIADEMA GROUP 
Alpheus gracilipes Stimpson 
Alpheus gracilipes Stimpson, I860. Acad. 
Nat. Sci. Philadelphia, Proc. 12:31. 
LOCALITIES: Fiji: 14 specimens from BF 5; 
14, BF 7; 22, BF 9; 1, BF 10; 5, BF 11; 2, 
BF 12; 32, BF 13; 10, BF 14; 2, BF 16; 12, 
BF 17; 3, BF 18; 15, BF 20. Tonga: 9, BT 
12; 2, BT 13; 2, BT 14; 2, BT 15; 1, BT 16. 
Samoa: 8 specimens from BAS 8; 3, BAS 4; 
2, BAS 5; 6, BAS 6; 1, BAS 8; 4, BAS 10; 
5, BAS 12; 4, BAS 13; 3, BAS 14; 4, BBS 1; 
4, BBS 2; 10, BBS 3; 5, BBS 5; 8, BBS 6; 
3, BBS 7; 5, BBS 8; 13, BBS 9; 3, BBS 10; 
1, BP 1; 4, BP 3; 1, BP 5; 7, BP 7; 2, BP 8; 
6, BP 11; 4, BP 13. 
Alpheus diadema Dana 
For full citation see Banner, 1956. 
localities: Fiji: 1 specimen from BF 3; 
2, BF 12; 2, BF 13; 2, BF 14; 2, BF 20. 
Tonga: 27 specimens from BT 11; 4, BT 12. 
Samoa: 3 specimens from BAS 1; 1, BAS 2; 
1, BAS 8; 16, BAS 10; 4, BAS 12; 2, BAS 13; 
5, BBS 10; 2, BP 4; 1, BP 12. 
Alpheus ehlersi de Man 
Alpheus ehlersi de Man, 1909^. Zool. Soc. 
London, Proc. 1909:663, pi. 70. 
LOCALITIES: Tonga: 5 specimens from BT 
5. Samoa: 5 specimens from BAS 10; 10, BBS 
2; 11, BBS 3; 1, BBS 10. 
DISCUSSION : These specimens agree very 
well with the original descriptions of de Man. 
The specimens show some variation, notably 
in the length of the stylocerite, the tip of 
which may reach to anywhere in the basal half 
of the second antennular article, in the merus 
of the large chela which varies from 2.2 to 
2.8 times as long as broad, in the large chela 
itself, which varies from 2.5 to 2.8 times as 
long as broad, in the dactylus of the large 
chela which varies from rounded to a pointed 
tip, and in the telson, the length of which 
varies from 2.7 to 3.1 times the breadth of 
the posterior margin. 
In two ways there may be slight differences 
between these specimens and those described 
by de Man. First, he describes the orbitorostral 
grooves as "rather deep, though narrow, 
grooves”; in these specimens we would prefer 
to call them at most moderately deep. This 
may be merely a matter of word usage. Second, 
in no specimen was the margin of the telson 
as convex in the basal half as shown by de 
Man for his specimens, although the telsons 
of the females are broader than those of the 
males; this probably is only a minor variation. 
The specimens of de Man lacked their third 
and fourth legs; these are intact on most of 
the specimens available. They are sufficiently 
similar to the fifth leg, drawn by de Man, 
that further description is unnecessary, except 
to add that the propodus carries five spines of 
moderate development. 
This species is surprisingly similar to A. 
gracilis simplex (Banner) of the Macrochirus 
group. When the specimens are laid side by 
side they may be distinguished by the dif- 
ferences in the orbital teeth, the orbitorostral 
groove, the telson, and usually by the black 
spine of the uropods, but the relationship of 
the parts of the antennular and antennal 
peduncles, the configuration of the thoracic 
appendages, including the maxillipeds and 
chelae, are almost the same. No intergrading 
specimens were found in the present collections. 
Alpheus paracrinitus Miers 
Alpheus paracrinitus Miers, 1881. Ann. Mag. 
Nat. Hist. V, 8:365, pi. 16, fig. 6. 
LOCALITIES: Fiji: 4 specimens from BF 2; 
14, BF 5; 6, BF 7; 3, BF 8; 12, BF 9; 3, BF 
10; 3, BF 11; 17, BF 13; 3, BF 14; 18, BF 
18; 3, BF 19; 5, BF 20. Tonga: 1 specimen 
from BT 11; 7, BT 12; 4, BT 14; 6, BT 17. 
Samoa: 3 specimens from BAS 1; 2, BAS 2; 
3, BAS 3; 9, BAS 5; 2, BAS 7; 2, BAS 8; 
2, BAS 9; 30, BAS 10; 6, BAS 12; 8, BAS 13; 
9, BAS 14; 13, BBS 1; 6, BBS 2; 10, BBS 3; 
7, BBS 4; 1, BBS 6; 3, BBS 8; 20, BBS 9; 
2, BBS 10; 1, BP 1; 3, BP 3; 10, BP 5; 2, 
BP 6; 6, BP 7; 6, BP 8; 4, BP 9; 1, BP 11; 
6, BP 13. 
