Hawaiian Crangonidae — BANNER 
87 
equal to the first peduncular article, and the 
scaphocerite from ' shorter than to as long as 
the antennular peduncle. De Man also sug- 
gests that the two forms of the large chela 
(one with a rather obtuse dactylus, the other 
with an acute dactylus) might be a sexually 
dimorphic trait; in general this was true in the 
Hawaiian specimens. 
distribution: C. ventrosa, in Hawaii at 
least, has always been found in living heads 
of corals of the genus Pocillopora, usually 
either P. meandrina var. nohilis Verrill or P. //- 
gulata Dana, and occasionally in P. damicornis 
(Linnaeus); in these corals it associates with 
Synalpheus charon (Heller) and crabs of the 
genus Trapezia. 
This, although not the most common Ha- 
waiian species, is certainly the most spectacu- 
lar, both in color and in size, and consequent- 
ly there have been many records of it through- 
out the Islands. The first record was under the 
name of A. laevis made by Randall in 1839; it 
was also reported by Dana (1852), Stimpson 
(I860), and Bate (1888). In the Islands it 
probably occurs wherever Pocillopora is found; 
specimens studied have come from the fol- 
lowing localities: on Oahu, both in shallow 
water and in water up to 20 feet or more deep, 
at Waimanalo, Hanauma Bay, Waikiki, Nana- 
kuli, and Kawela Bay; on Maui, at Makena 
and Lahaina. Previously unreported specimens 
collected by the "Albatross” came from the 
following locations: Honolulu (further data 
unrecorded); south of Molokai, 23-24 fath- 
oms; two dredge hauls on Penguin Bank 
(west of Molokai), 27-29 fathoms; and off 
Kauai, 18-41 fathoms. "Albatross” Stations: 
(not recorded), 3847, 4031, 4032, and 4023, 
respectively; U.S.N.M.: 63633, 63634, 63636 
(63637, 63638 — lot divided into two vials), 
and 63635, respectively. Edmondson (1925) 
has reported the species from French Frigate 
Shoal and Laysan Island; there are 15 speci- 
mens in Bernice P. Bishop Museum jfrom 
Pearl and Hermes Reef. 
Crangon ventrosa has been reported through- 
out the entire tropical Indo-Pacific region. 
from the Gulf of Akabah at the western tip of 
the Red Sea to the Gulf of California in Mex- 
ico. Edmondson has reported the species from 
Johnston, Wake, and Palmyra Islands, and 
others have reported it from Tahiti. 
As C ohesomanus (Dana), Boone (1935: 135) 
reported the following previous distribution- 
al records (in part) : "Gulf of California (Cou- 
tiere) ; Sandwich Islands (Randall) ; Honolulu 
(Bate) ; . . . Sandwich Islands and Fiji Islands 
(Dana) ; . . . Gulf of Aykab [sic] and through 
the Red Sea (de Man) . . . . ” She mentions none 
of the records noted above for C. ventrosa 
(1935: 126). Inasmuch as the records here 
quoted from Boone were made by the authors 
to which she attributes them not for C. obeso- 
manus but for C. ventrosa (A. laevis), it would 
appear that these records have been inter- 
changed. However, other records listed by her 
under C. ohesomanus are correct. 
Crangon amirantei (Coutiere) 
Fig. 29 a-j 
Alpheus amirantei Coutiere, Soc. Philomath. 
Paris, Bui. IX, 11(5): 15-16, 1908. 
Alpheus amirantei CouXAhtQ, Linn. Soc. London, 
Trans. II (Zoology), 14(4): 421, pi. 63, fig. 
16, 1931. [Text exactly the same as 1908 
reference; plates not previously published.] 
DESCRIPTION: Carapace with swollen, al- 
most hemispherical orbital hoods, anterior 
margin of hoods produced as rounded, sub- 
vertical keel slanting mesad ventrally, area be- 
tween keel and rostrum flat. Frontal margin 
anterior to orbital hoods almost straight; small 
notch near base of rostrum. Rostrum small, 
extending less than 0.5 length of visible por- 
tion of first antennular article, with high ros- 
tral Carina only slightly lower than orbital 
hoods. Deep depression between rostral base 
and orbital hoods. Side of carapace between 
base of antenna and orbital hood depressed. 
Visible portion of first antennular article as 
long as second; third article about 0.75 length 
of second; second article about 1.5 times as 
long as broad. Stylocerite very short, reaching 
