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PACIFIC SCIENCE, VoL XIII, April, 1959 
first antennular article, but they are shorter in 
this form. Coutiere regarded the number of 
spinules on the merus of the third legs as im- 
portant in his description of his variety S', p. 
cargadosi (1921: 417), but neither in de Man’s 
species, nor in Coutiere’s original description 
(where he described pachymeris as a variety of 
S. hiunguiculatus = S. coutierei), any more than 
in these specimens, were the number of 
spinules constant between individuals. 
Unfortunately the name tuthilli used in the 
genus Alpheus will have to be put in synonymy 
^ in a subsequent paper; this is another attempt 
to express thanks to Dr, Leonard D. Tuthill, 
friend and former editor of Pacific Science, for 
the help he has given me. 
Alpheus Fabricius 
Megacheles Group 
Alpheus lanceostylus sp. nov. 
Fig. ^a-h 
Alpheus species 1, Banner, Pacific Sci., 10(3): 
338, 1956. 
type: 28 mm. male collected at Pearl and 
Hermes Reef, Hawaiian Archipelago (27°N., 
146°W.), by U. S. Navy Ship "Dranga” in 
1927. Bernice P. Bishop Museum No. 2737. 
paratype: An ovigerous female 22 mm. 
long without chela collected from Saipan, 
Marianas (probably from the reef flat west of 
Cape Nafutan— exact data are lost), by A, H. 
Banner in 1945. 
DESCRIPTION: Rostrum acute, reaching be- 
yond end of first antennular article, broad at 
the base, dorsally only slightly rounded. Orbi- 
torostral borders slightly concave. Orbital 
teeth strong, similar in shape to rostrum and 
about half as long. 
Antennular peduncle with the second article 
1.6 times the length of the visible portion of 
the first article, 1.2 times the length of the 
second article, and 1.3 times as long as broad. 
Stylocerite acute and reaching to middle of 
second antennular article. Scaphocerite broken 
on right side, left side with broad squamous 
portion reaching almost to tip, and tip slightly 
exceeding end of third antennular article. 
Carpocerite reaching slightly beyond end of 
scaphocerite. Lateral spine of basicerite not 
heavy, and reaching to level of tip of rostrum. 
Merus of large cheliped with inner face 1.5 
times as long as maximum breadth distally; 
superior margin terminating in subacute 
tooth; inferior external margin irregular but 
not bearing spines; inferior internal margin 
bearing 10 small movable spines and termi- 
nating distally in strong acute tooth. Ischium 
bearing 4 inferior spines and a strong superior 
tooth. Carpus bearing a rounded tooth on 
superior internal distal margin. Chela heavy, 
compressed, almost as broad distally through 
the fingers as proximally, 2.9 times as long as 
broad. Superior crest of palm terminating 
distally in strong acute tooth, interrupted by 
shallow and poorly defined transverse groove, 
and proximally merging with surface of chela. 
Superior groove shallow and flattened. Pal- 
mar crest broadly rounded and poorly defined 
proximal to transverse groove. Palmar groove 
broad and rounded. Inferior crest distinct 
only distally and ending in strong tooth. In- 
ferior depression deep but rounded. Shoulder 
distinct but not abrupt. (For explanation of 
terms see Banner, 1953, fig. 17e). Fixed finger 
strongly curved. Dactylus closing across end 
of chela, thin with high sharp crest, and 
strongly curved; superior margin without 
marked lobes, inferior margin with what ap- 
pears to be an extra rounded tooth. Cheliped 
bearing only scanty setae except near fingers 
where setae are somewhat heavier. 
Small chela lacking in both type and 
paratype. 
Carpal article of second legs with ratio 
10:7:4:3:5. 
Third legs with ischium bearing movable 
spine; merus 6.6 times as long as broad, un- 
armed; carpus unarmed and 0.5 length of 
merus; propodus bearing 7 weak spines, 0.7 
as long as merus; dactylus slender, curved, 
with single superior serration. 
Telson 1.4 times as broad proximally as 
distally, 2.5 times as long as tip is broad, with 
