BRACHYURA AND MACRURA OF HAWAIIAN ISLANDS. 
877 
Dimensions. — The single specimen, which is a young female, measures only 4.2 mm. long and 
4.7 wide. 
Type locality. — North coast of Maui Island, 238 to 253 fathoms, station 4083, 1 female (Cat. 
No. 29791). 
Family INACHID£. 
Achasus affinis Miers. 
Achxus affinis Alcock, Jour. Asiat. Soc. Bengal, LXIV, 1895, 172. 
Distribution. — South coast of Molokai Island, 60 to 64 fathoms, station 3845; vicinity of Laysan 
Island, 163 to 59 fathoms, station 3939; northeast coast of Hawaii Island, 50 to 63 fathoms, station 4063; 
north coast of Maui Island, 56 to 59 fathoms, station 4072. 
Achaeopsis superciliaris Ortmann. 
Achseopsis superciliaris Ortmann, Zool. Jahrb., Syst., VII, 1893, 36, pi. m, fig. 3. 
Distribution. — Vicinity of Laysan Island, 163 to 59 fathoms, station 3939; north coast of Maui 
Island, 57 to 58 fathoms, station 4076. 
The specimens which I have referred here are much smaller than that figured by Ortmann, the 
largest measuring 4.7 mm. in length. They are, however, adult, most of the females being laden with 
ova. The margin of the rostral lobes, as well as the supra-ocular margin, is spinulous. The spine 
above the posterior branchial margin represented by Ortmann is indicated only by a tubercle. Nev- 
ertheless, I think it very probable that they are the same species. 
Cyrtomaia smithi Rathbun. 
(PI. VI.) 
Cyrtomaia smithi Rathbun, Proc. U. S. Nat. Mus., XVI, 1893, 229. 
A large species. 
Surface covered with rough granules, carapace finely pubescent anteriorly. Regions well marked. 
Three gastric spines, the posterior median the smallest; cardiac region divided by a shallow longitu- 
dinal depression into two swellings each tipped with a spine. Other spines are as follows: One small 
anterior branchial; a submarginal branchial row continued on the pterygostomian region; a promi- 
nent spine at outer angle of orbit and another on upper margin, a line of spinules between and in line 
with the upper orbital and the larger gastric spine; one or more median gastric spinules; a small 
marginal hepatic spine. Rostral spines short, conical, horizontal, interspace V-shaped; median sub- 
rostral spine equally strong. Spines of carapace diminishing in size with age. 
Basal joint of antennae with outer and anterior margin spinulous. 
Chelipeds in male three and three-fourths times as long as body, armed with spines and spinules; 
merus nearly as long as propodus, the longest spine on the innermost row. Palms enlarging distally, 
a row of strong spines on middle of inner and of outer face; protuberances of upper surface very coarse. 
Fingers irregularly toothed, narrowly gaping. Palms of female much more slender. 
First pair of legs four or five times as long as carapace, spines of last two joints extremely long 
and slender on the lower or posterior side, forming in flexion a formidable weapon. Other legs 
rapidly difninishing in length, strength, and armature, the last pair being two and a half times length 
of carapace and devoid of spines except one at tip of merus. In the old the penult pair is equally 
devoid of spines. In the young the last three pairs are very nearly of a length. 
Sternum armed with spines mostly slender. First and sixth segments of abdomen in both sexes 
with a distal median spine; second to fifth segments, inclusive, with two distal submedian spinules. 
Dimensions. — Male, station 3984, length to median sinus 61, to tip of rostrum 65, width 69.3, length 
of arm 105, of propodus 113, of dactylus 48.8, length of first ambulatory about 235 mm., greatest span 
2 feet 4 inches. The largest specimen is a male, station 4083, which has a paper shell and is badly 
broken. Length of arm 140, of propodus 149, of dactylus 67, span 3 feet. 
Color. — Note by collector on male, station 3817: “Pale pink on sides and posterior portion of 
carapace, becoming salmon pink on anterior part of carapace and on two anterior pairs of legs; three 
posterior pairs lighter, almost white; eyes lustrous gray.” 
Note by collector, station 3984: “ Female, pale madder pink shading to yellow ocher on dorsum of 
legs. Abdomen white. Male, pale yellow ocher.” 
