Alpheid Shrimp — BANNER 
149 
It may be that this is the wrong conclusion 
to draw from these specimens. Certainly two 
male specimens are not enough to prove or 
disprove the relationship. Only when a series 
of specimens of different body lengths are 
available can it be safely said that this is or is 
not a growth difference. 
It should also be noted that the merus of 
the larger chelipeds of the 22 mm. female and 
the 27 mm. male bear a small acute tooth at 
the termination of the inferior internal margin, 
while the 22 mm. male, like those from Ha- 
waii, lack this tooth. 
The one specimen from the Tuamotus is a 
smaller male and similar in the form of the 
small chela to those from Hawaii. 
Alpheus strenuus Dana 
For synonymy, see Banner, Pacific Sci. 11(2): 
204, 1957. 
LOCALITY: 1 Specimen, Station Y-122 from 
Tomil Harbor, Yap Island, Caroline Archi- 
pelago, in shallow burrows, intertidal zone; 
collected by R. W. Hiatt, 1946. 
Alpheus pacificus Dana 
For synonymy, see Banner, Pacific Sci. 10(3): 
362, 1956. 
LOCALITY: 2 specimens from Midway Is- 
land, Hawaiian Archipelago; collected by 
Y. D. P. Speicer, 1941. 
Alpheus malabarkus (Fabricius) mackayi 
subsp. nov. 
Fig. I2a-n 
Astacus malabarkus Fabricius, System. Ent. 
p. 415, 1775. 
Alpheus malabarkus Fabricius, Sup. Ent. Sys- 
tem., p. 405, 1798. 
Alpheus malabarkus Henderson, Zool. Soc. 
London, Trans., II, 5: 434, pi. 40, figs. 1-3, 
1893. [Species reestablished and rede- 
scribed.] 
Alpheus malabarkus de Man, Siboga Exped. 
39a^ (2): 429, 1911. [New subspecies with 
separate synonymy.] 
Alpheus malabarkus Barnard, South African 
Mus., Ann., fig. 142 1-n, 1950. 
Crangon species, McKay, Canad. Eield-Nat. 
61(4): 135, pi. 1, 1947. 
TYPES: Holotype, an ovigerous female 37.8 
mm. long; allotype, a male 27.7 mm. long; 
both collected by Donald C. G. MacKay in 
Wailupe fish pond, Oahu, Hawaii. 
DESCRIPTION: Orbital hoods and rostrum 
protruding far beyond anterolateral margins 
of carapace. Orbital hoods inflated, high, 
rounded; rostrum short, not reaching beyond 
anterior margin of orbital hoods, Carina short, 
rounded, not reaching to middle of orbital 
hoods; interorbital area behind termination 
of Carina flat, anteriorly abruptly demarked 
from convexity of orbital hoods. 
Antennular peduncle with second article 
about 2.4 times as long as broad, about twice 
length of visible portion of first article and 
not quite 3 times length of third article. First 
article terminating in high setose crest on 
superior margin; basicerite broad, flat, with 
small anterior tooth not reaching to end of 
first article. Basicerite with acute lateral tooth. 
Scaphocerite reaching to beyond end of an- 
tennular peduncle, squamous portion broad, 
slightly narrowing distally, and exceeded by 
the lateral spine; lateral spine curved inward 
at tip. Carpocerite reaching to end of lateral 
spine of scaphocerite. 
Large chela of male and female of similar 
proportions, and almost identical size in spite 
of difference in body lengths. Merus with 
outer face 1.7 times as long as broad; superior 
margin ending distally in slight projection; 
inferior internal margin terminating in strong 
acute tooth, otherwise unarmed. Carpus of 
usual form. Large chela 2.4 times as long as 
maximum width, tapering towards fingers, 
with maximum width of fingers 0.66 as wide 
as palm; fingers strong, occupying the distal 
0.3 of chela (about half as long as palm). 
Palm with rounded depressed areas on either 
face, both roughly triangular; superior margin 
of palm ending in shoulder overhanging 
shallow, rounded groove that connects de- 
