88 
PACIFIC SCIENCE, Vol. XVIII, January 1964 
Synalpheus heroni Coutiere 
Synalpheus heroni Coutiere, 1909. U. S. Nat. 
Mus., Proc. 36:42, fig. 24. 
LOCALITIES: Canton Island: 1 specimen from 
BC 12. Christmas Island: 2 specimens. 
ALPHEUS Fabricius 
MEGACHELES GROUP 
Alpheus collumianus inermis Banner 
Alpheus collumianus inermis Banner, 1956. 
Pacific Sci. 10(3) :342, fig. 12 a-i. 
LOCALITIES: Canton Island: 1 specimen from 
BC 15; 1, BC 24. 
Alpheus collumianus medius Banner 
Alpheus collumianus medius Banner, 1956. 
Pacific Sci. 10(3) :340, fig. 11 a-h. 
Crangon collumianus Edmondson, 1923. B.P. 
Bishop Mus., Bull. 5:28. (6 specimens 
collected from Palmyra Island). 
LOCALITY: Christmas Island: 1 specimen. 
Alpheus oahuensis Banner 
Alpheus oahuensis Banner, 1953. Pacific Sci. 
7(1) :64, fig. 20 a— 1. 
LOCALITY: Christmas Island: 1 specimen. 
Alpheus deuteropus Hildgendorf 
Alpheus deuteropus Hilgendorf, 1878. Mo- 
nats. Berlin Akad. Wiss., p. 834, taf. 4, 
fig. 8. 
LOCALITY: Christmas Island: 5 specimens. 
DISCUSSION: These specimens were collected 
from fissures in a head of Astreopora myri- 
ophthalma found about the low-low tide zone on 
the ocean reef on the lee side of the island 
(near the old village site called Paris). Upon 
return to Hawaii several heads of Porites lobata 
Vaughn showing fissures were collected from 
about 6-ft water in Kaneohe Bay, Oahu. Each 
fissure had a pair of cohabiting A. deuteropus. 
The fissures are usually up to about 10 cm 
long, but may be considerably longer; the width 
is 5 mm or less, and the depth usually about 
2 or 3 cm. The fissures are in the living coral 
and their tops are at times flush with the head 
and at times depressed at the base of a ''valley” 
between the lobes. They are usually sinuate and 
often have blind side branches 1 or 2 cm long. 
The shrimp appear to live at the base of the 
fissure, and when frightened they will withdraw 
into round blind tubes penetrating directly into 
the head of coral. In one head, the only one 
examined that cracked so as to permit the fol- 
lowing of the tube, the tube penetrated about 2 
cm and then bifurcated, with the branches lying 
at an angle of about 90° to each other and 
penetrating about 4 cm beyond the bifurcation; 
at the end of the branches were hidden alpheids, 
the male in one branch and the female in the 
other. 
MACROCHIRUS GROUP 
Alpheus lottini Guerin 
Alpheus lottini Guerin, 1830. Voy. de la 
Coquille, Atlas, Crust. 5 ( 2 ): 38, pi. 3, fig. 3. 
Stebbing, 1915. S. African Mus., Ann. 25: 
82. Barnard, 1950. S. African Mus., Ann. 
38:748, fig. 141 e-j. Holthuis, 1958. Israel 
Sea Fish. Res. Stat. Bull. 17, Contri. Know. 
Red Sea No. 8, p. 22. 
Alpheus ventrosus H. Milne-Edwards, 1837. 
Hist. Nat. Crust. 2:352. 
Alpheus laevis Randall, 1839. Acad. Nat. Sci. 
Philadelphia, Journ. 8(1): 141. 
Alpheus obesomanus Boone, 1935. Vanderbilt 
Mar. Mus., Bull. 6:135. [partim] 
Crangon ventrosa Banner, 1953. Pacific Sci. 
7(1) :84, fig. 28. 
Crangon latipes Banner, 1953. Pacific Sci. 
7 ( 1 ) : 52, fig. 27. 
LOCALITIES: Canton Island: 2 specimens from 
BC 2; 2, BC 17. Johnston Island: 1 specimen 
from J— 1; 2, J-5; 2, J-6; 2, J-16; 2 J-17. 
DISCUSSION: In the heads of Pocillopora 
meandrina examined at Canton Island it was 
noted that this species and Synalpheus charon 
(Heller) live in different zones in the live coral. 
Alpheus ventrosus, together with crabs of the 
genus Trapezia, lived in the portions more distal 
from the base, and V charon lived in the most 
basal branches of the live coral. 
It is with regrets that we follow Holthuis 
( 1958:22) in changing the name of this species 
from the well-known A. ventrosus H. Milne- 
Edwards to the seldom -used A. lottini Guerin 
( in Guerin’s description lottini is spelled lottinii 
but on the plates it is spelled lottini. The latter 
spelling takes precedence). Guerin’s name does 
take precedence, but had Kingsley (1883) not 
