Decapod Crustacea—Hi ATT 
79 
(on XIII.) is absent. The total number of 
arthro- and pleurobranchs on IX. to XIV. is 
thus 10 instead of 11. Well-developed epi- 
podites occur on all the pereiopods with the ex¬ 
ception of XIV. 
Rhynchocinetes rugulosus Stimpson 
Although this species is known from the 
Hawaiian archipelago through a small specimen 
dredged up in 1902 (Rathbun, 1906:911) by 
the "Albatross” at French Frigate Shoals in 17 
fathoms, and another small specimen taken at 
Laysan Island in 1923 (Edmondson, 1925:6), 
a specimen taken off Oahu is the first instance 
of its occurrence among the main Hawaiian 
Islands. The species is apparently widespread 
throughout the Indo-Pacific region, having 
been first known from Port Jackson, Australia 
(Stimpson, 1860:36). Later it was collected at 
Lord Howe Island (McCulloch, 1909:310), the 
Kermadec Islands (Chilton, 1910:548), the 
Loyalty Islands (Borradaile, 1916:85), and in 
Japan (Kemp, 1925:263; Kubo, 1936:1887). 
One male specimen 80 millimeters in length 
was taken in a small-meshed fish trap off Dia¬ 
mond Head, Oahu, along with two large males 
of jR. rigens. This specimen is considerably 
larger than Stimpson’s type; it has 5 teeth dor- 
sally near the tip of the rostrum as compared 
to 3 for the type specimen, and it has 13 teeth 
below as compared to 12 in the type. These 
differences are probably within the range of 
variation for these variable structures. In other 
morphological aspects no differences from the 
type are apparent. 
Two of the six species comprising the un¬ 
usual genus Rhynchocinetes , in which the ros¬ 
trum is articulated with the carapace, are now 
known to occur in Hawaii. They may be dis¬ 
tinguished as follows: 
1. Two teeth on carapace behind rostral 
articulation; no tooth on either side of 
fourth or fifth abdominal somites above 
posterior edge of pleuron; rostrum with¬ 
out lateral ridge, articulation with cara¬ 
pace complete. . . . R. rugulosus Stimpson. 
2. Three teeth on carapace behind rostral 
articulation; a tooth on each side of fourth 
and fifth abdominal somites above pos¬ 
terior edge of pleuron; rostrum with 
strong lateral ridge, articulation with cara¬ 
pace incomplete. . . . R. rigens Gordon. 
Family Gnathophyllidae 
Hymenocera elegans Heller 
A female specimen measuring 55 millimeters 
in length was taken at a depth of 4 fathoms in 
a crevice in lava rock encrusted with coral 
(Porites lohata ), located about 200 feet toward 
Kohala from the new dock at Kawaihae on the 
island of Hawaii. This record represents the 
second in Hawaiian waters for this bizarre 
shrimp, and the first record for the island of 
Hawaii. Edmondson (1935:17) collected the 
first Hawaiian representative in 1934 among 
the branches of a Routes sp. coral head on a 
shallow reef in Kaneohe Bay, Oahu. The color 
pattern of the present specimen was almost 
identical with the one described by Edmondsoa 
Suborder REPTANTIA 
Family Latreillidae 
Latreillopsis hawaiiensis Edmondson 
This species, described by Edmondson (1932: 
2) from a single specimen, has been col¬ 
lected in Hawaii for the second time. On Janu¬ 
ary 28, 1947, one of these giant, deep-sea crabs 
became entangled in the fish lines of a fisherman 
who was bottom-fishing to a depth of 500 
fathoms, 5 miles directly off Kewalo Basin, 
Oahu, and it was subsequently brought to my 
attention. Since the type specimen was taken 
at 30 fathoms and the present specimen was 
collected at 500 fathoms, it is apparent that the 
bathymetric range of this unusual crab is great. 
The greatest length of this male specimen is 
126 mm.; the greatest width is 111 mm., almost 
identical with the type specimen in size. The 
rostral spine and the supraocular spines are worn 
