892 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family HAPALOCARClNIDAt. 
Hapalocarcinus marsupialis Stimpson. 
Hapalocarcinus marsupialis Stimpson, Proc. Boston Soc. Nat. Hist., VI, 1859, 412. Caiman, Trans. 
Linn. Soc. London (2), VIII, 1900, 43, pi. Ill, tigs. 29-40, and synonymy. Borradaile, Fauna 
and Geogr. Maidive and Laccadive Arch., I, 271, 1902. 
Distribution. — Hilo, Hawaii, 1 fathom (Stimpson); Hawaiian Islands (Verrill); Kailua, August, 
1901, one female, without indication of habit. 
Forms galls on certain species of branching coral (see Caiman) . 
There is no reference to this species in the manuscript of Stimpson’ s unpublished report of the 
Crustacea of the North Pacific Exploring Expedition, but among the illustrations there is a figure of 
the dorsal aspect of the animal enlarged twice. With reference to the discrepancies in Stimpson’ s 
description pointed out by Caiman (op. cit., p. 44), it may be said that “antennae” should be read for 
“ antennules, ” as the latter are represented of good size in Stimpson’s figure. The general appearance 
of the figure is the same as that of our specimen; the front is truncated and a little concave, and there 
is no median tooth as represented by Caiman. 
The female from Kailua has the abdomen filled with eggs; the pouch is much more expanded 
than shown by Caiman (op. cit., fig. 30), being about twice as wide as the carapace, and at the same 
time extending forward to the middle of the latter. 
Length of carapace 4, width 3.8, width of egg-pouch 
7 mm. 
MACRURA. 
Family CALLIANASSIDA). 
Callianassa articulata, sp. nov. 
Belongs to the group with three long frontal spines 
and a short telson. 
Median rostral spine reaching end of eyes. Lateral 
spine just outside the eye, much shorter than the median, 
and articulated at its base. 
Telson much broader than long, concave behind, un- 
even, sparingly setose. 
Ophthalmopods not reaching end of first antennular 
segment, cornea large, hemispherical, occupying more 
than half length of stalk and reaching to end of it. 
Third antennular segment one and a half times as 
long as second; outer flagellum much thicker and a little 
shorter than inner one and as long as peduncle. 
Antepenult segment of antennal peduncle armed 
above with a distal terminal spine; last two .joints sub- 
equal; flagellum twice as long as carapace. 
Ischium and merus of outer maxilliped nearly twice as wide as propodus; ischium with an inferior 
comb of spinules; one spinule on anterior margin of merus. 
First pair of chelipeds smooth, very unequal in width, of nearly same length ; ischium and merus 
spined on lower margin. Wrist of larger cheliped more than twice as high as long, a small tooth at 
lower distal angle. Carpus, propodus-, and dactylus margined above and below, and beset along the 
margins, and on distal portion of palm, as well as on the fingers, with tufts of a few hairs. Palm very 
little longer than high. Fingers shorter than palm, broad, not gaping, a low tooth near middle of 
prehensile edge of each, tips crossing. 
Carpus of smaller cheliped longer' than that of larger, but still higher than long; palm also longer; 
fingers not dentate. 
Dimensions . — Length of carapace, ovigerous female, type, 6.4 mm., of abdomen 16 mm. 
Distribution . — Vicinity of Modu Manu, 23 to 33 fathoms, stations 4146 and 4148 (type locality), 
1 female at each. Cat. No. of type, 30532. 
The lateral movable spine of the anterior margin and the large cornea distinguish this species. 
Fig. 47 —Callianassa articulata, station 4148. a, 
Left cheliped, x 3J. 6, Right cheliped, x 3£. c, 
Anterior portion, x 3$. d, Third maxilliped, 
x 8. e, Tail-fan, x 4§. 
