174 
PACIFIC SCIENCE, VoL XX, April 1966 
A. per plexus Banner 
A. chamorro Banner 
A. rathbunae (Schmitt) 
A. idiocheles Coutiere. Synonym: A. baculifer 
Coutiere 
A. micros cap his (Banner) 
Alpheus obesomanus Dana 
Fig. 8 
Alpheus obesomanus Dana, 1852^, Acad. 
Nat. Sci. Philadelphia, Proc. 12:21; 1852 b, 
U. S. Explor. Exped. Crust. 13:547, pi. 
34, fig. 7. — Boone, 1935. Vanderbilt Mar. 
Mus., Bull 6:135, pi 35. 
Alpheus lutini Coutiere, 1905. Fauna and 
Geog. Maid, and Laccad. 2(4):885, pi. 
76, fig. 24. 
Alpheus species 2 Banner, 1956. Pacific 
Sci. 10(3) :351, fig. 15. 
localities: Fiji: 2 specimens from BF 3; 
1, BF 4; 6, BF 11; 1, BF 13; 2, BF 14; 5, 
BF 15; 3, BF 21. Tonga: 4 specimens from 
BT 4; 1, BT 11; 9, BT 12; 1, BT 13. Samoa: 
12 specimens from BAS 1; 2, BAS 2; 4, BAS 
3; 9, BAS 5; 25, BAS 6; 23, BAS 7; 9, BAS 
8; 3, BAS 9; 24, BAS 10; 12, BAS 12; 12, 
BAS 13; 18, BAS 14; 5, BBS 1; 54, BBS 2; 
4, BBS 3; 7, BBS 4; 2, BBS 7; 6, BBS, 8; 20, 
BBS 9; 2, BBS 11; 1, BP 1; 22, BP 4; 1, BP 
6; 5, BP 8; 4, BP 10; 15, BP 11; 2, BP 12; 
2, BP 13; 69, BP 14. 
DISCUSSION: One specimen from Samoa is 
noteworthy. While normal in all other respects, 
it is entirely lacking in antennular flagella, 
carpocerites, and more proximal articles of the 
antennal flagellar base, and the scaphocerite is 
degenerate, somewhat similar to that of A. 
malleodigitus. The other specimens from the 
same locality are normal. This has been inter- 
preted as a possible congenital defect. 
Alpheus microstylus (Bate) 
Fig. 8 
Betaeus microstylus Bate, 1888. Challenger 
Repts. 24:566, pi. 101, fig. 6. 
Alpheus obesomanus de Man, 1888 A Arch. 
Naturg. 53:520; 1902. Senckenb. Naturf. 
Gesells., Abhandl. 25:867. 
Alpheus malleodigitus Coutiere, 1899. Les 
Alpheidae, p. 223, 316, figs. 270-272, 
400. [nee: A. malleodigitus (Bate).} 
Alpheus microstylus Coutiere, 1905. Fauna 
and Geog. Maid, and Laccad. 2(4): 884, 
pi. 76, fig. 23. 
LOCALITIES: Samoa: 1 specimen from BAS 
10; 1, BBS 10; 1, BP 13- 
Alpheus malleodigitus (Bate) 
Fig. 8 
Betaeus malleodigitus Bate, 1888. Challenger 
Repts. 24: 565, pi. 101, fig. 5. 
Alpheus malleodigitus de Man, 1902. 
Senckenb. Naturf. Gesells., Abhandl. 25: 
866. 
Alpheus malleodigitus var. gracilicarpus de 
Man, 1909. V. Ned. Dierk. Ver., Tijdschr. 
11 ( 2 ) : 99 - 
Alpheus phyrgianus Coutiere, 1905. Fauna 
and Geog. Maid, and Laccad. 2(4): 886, 
pi. 77, fig. 25. 
Alpheus persicus Nobili, 1906. Bull. Sci. 
France et Belgique 40: 33. 
LOCALITIES: Fiji: 1 specimen from BF 4; 
4, BF 6; 1, BF 8; 2, BF 11; 2, BF 12; 4, BF 
13; 1, BF 20. Tonga: 1 specimen from BT 9; 
1, BT 10; 3, BT 11; 1, BT 12; 38, BT 13; 
1, BT 16. Samoa: 3 specimens from BAS 5; 
6, BAS 6; 9, BAS 7; 3, BAS 12; 2, BAS 13; 
5, BAS 14; 1, BBS 2; 4, BBS 4; 2, BBS 5; 
2, BBS 7; 20, BP 4; 6, BP 12. 
DISCUSSION: For a discussion of this species 
see page 170. 
Alpheus samoa sp. nov. 
TYPE SPECIMEN: A male, carapace length 
3.5 mm, collected at BAS 5. Paratype, a second 
male, carapace length 3.0 mm, collected at 
BAS 14. (Specimens and drawings lost.) 
DESCRIPTION: Orbital hoods rounded, with 
second antennular article 5 times as long as 
broad, over 3-5 times as long as first and 2.7 
times as long as third. Upper antennular 
flagellum broad, 1.2 times as long as peduncle, 
1.3 mm long, without any subterminal bifur- 
cation, lower or inner flagellum 2.2 mm long. 
Stylocerite reaching scarcely beyond margin of 
carapace, rounded. Basicerite unarmed; scapho- 
