138 
PACIFIC SCIENCE, VoL VII, January, 1953 
second leg (10 : 6 : 2 : 2 : 4, as taken from the 
drawings) are almost within the range of vari- 
ation of the Hawaiian form. 
De Man (1911) suggests that possibly C 
crassimanus is a synonym for C. lohides (de 
Haan) , but a study of the literature following 
the publication of the note reveals that the 
question has not yet been settled and that C 
crassimanus is still accepted as a valid species. 
One specimen of this species in my collec- 
tion and two in the collections of the Bernice 
P. Bishop Museum (No. 5057) bear an un- 
usual parasite attached to the posterior ven- 
tral portion of the thorax. It is in the form of 
a more or less bean-shaped body, whitish in 
color and about 5 mm. long, which is attached 
by a short stalk. The specimens from the Ber- 
nice P. Bishop Museum were described as 
new by Nierstrasz and Brandis (1930) as Faba 
glabra^ while my specimen was identified as 
this species by Dr. Edward C. Reinhard. The 
parasite is of unknown systematic position, 
but the original authors suggest it may be an 
epicaridan crustacean. It is interesting to note 
that, of all the crangonids from Hawaii, the 
parasite has been found only on this one spe- 
cies and that on that species it is extremely 
rare. 
DISTRIBUTION: This species is one of the 
most common in the shallow inshore waters 
of the reefs. There is, in Hawaii, no record of 
its collection from water over 5 or 6 feet deep. 
On Oahu it has been collected from the fol- 
lowing localities: Kaneohe Bay, Koko Head, 
Black Point, Waikiki, Pearl Harbor, Moku- 
leia, Haleiwa, Kaaawa, Punaluu; on Maui it 
was collected at Kalama Park and 12 miles 
south of Lahaina; on Molokai at Kainalu. 
Edmondson (1925) reported the species from 
Laysan and Lisianski Islands. The "Albatross” 
collected specimens in Pearl Harbor (U.S.N. 
M. 63559) and Honolulu Reef (U.S.N.M. 
63560, 63562). 
In the central Pacific the species was re- 
ported by Edmondson (1925) from Johnston 
Island. It ranges through the Indo-Pacific re- 
gion and has been reported from places as far 
distant from Hawaii as Djibouti, at the mouth 
of the Red Sea, and Cape York, Australia. 
Crangon pacifica (Dana) 
Fig. 50 a-i 
Alpheus pacificus Dana, U. S. Explor. Exped. 
13 (1): 544, pi. 34, fig. 5, 1852. 
Alpheus pacificus Dana, Acad. Nat. Sci. Phila., 
Proc. 6: 21, 1854. [Diagnosis without fig- 
ures.] 
NEOTYPE: A male 32 mm. long, collected 
at Kalama Park, about 18 miles southeast of 
Lahaina, Maui, from a coral head in about 3 
feet of water (U.S.N.M. 93462). 
DESCRIPTION : Rostrum acute, triangular, al- 
most twice as long as broad at base, reaching 
nearly to 0.7 of visible portion of antennular 
peduncle; margins straight, with few short 
setae. Rostral carina rounded, arising slightly 
posterior to eyes. Orbital hoods not greatly 
inflated, rounded anteriorly. Orbitorostral 
groove moderately shallow with gradually 
sloping margins ; anterior portion of carapace 
between rostral base and front of orbital 
hoods concave. 
Second article of antennular peduncle about 
1.5 times as long as broad, 1.2 times as long 
as visible portion of first or third articles. 
Spine of stylocerite reaching slightly past end 
of first antennular article. 
Lateral spine of basicerite reaching almost 
as far as spine of stylocerite. Scaphocerite with 
squamous portion well developed, more than 
0.9 length of slender lateral spine; lateral mar- 
gins only slightly curved. Carpocerite slightly 
longer than scaphocerite; scaphocerite 0.1 
longer than antennular peduncle. Antennal 
flagellum longer than body. 
Large chela massive, 2.2 times as long as 
broad, compressed, twice as broad as thick, 
with lobes and crests. Superior margin cut by 
deep transverse groove proximal to dactylus, 
proximal edge of groove overhanging, distal 
edge rounded; groove continued on outer 
face as shallow, poorly defined, depressed 
area extending downward about 0.3 breadth 
