884 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Parthenope (Platylambrus) stellata, sp. nov. 
(PI. xv, figs. 1, 2, and 7.) 
Carapace subtriangular, one and a half times as broad as long. A shallow post-hepatic constric- 
tion. Surface of carapace and chelipeds covered everywhere with flattened stellar granules, varying 
in size and densely placed. Branchio-cardiac and branchio-hepatic depressions not very deep. Pro- 
tuberances surmounted by a tubercle disposed as follows: Three gastric in a triangle base forward, two 
median cardiac, the anterior much the more prominent, two branchial, the posterior on postero- 
lateral margin and both in line with one at end of posterior margin. 
Front narrow, tip tuberculiform. The outer angle of the antennulary fossette is a projecting 
tooth. 
A small, blunt spine near posterior end of hepatic margin. Thirteen or fourteen similar spines 
on antero-lateral margin of branchial region, the last of which forms the lateral angle; near it, on the 
transverse portion of the postero-lateral margin, two or three spines. 
Chelipeds massive, in the male three times as long as carapace; surface nodular; arm obscurely 
prismatic, margins armed with short, granulated spines, those of the posterior margin the larger, the 
row being continued proximally on the upper surface. One chela a little stouter than the other, 
marginal protuberances very nodular and irregular, the largest near middle of inner margin. Fingers 
of larger chela gaping. In the type the pollex of the smaller claw is entirely lacking, the propodus 
being truncate at the distal end, with the lower corner smoothly rounded. 
Legs very rough, with spinulous borders and surface sharply granulate; lower surface of all the 
legs and upper surface of merus of the first to third pairs relatively smooth. Distal two-thirds of 
propodus and basal half of dactylus clothed with long, coarse hair. 
Variations. — The above description applies to the type specimen only. A smaller male (station 
4045) shows the tubercles and spines all sharp instead of blunt pointed, and lacks the hair near the 
ends of the legs. 
Five of the other six specimens are so different from the type as almost to be declared an inde- 
pendent species. They may be known as P. (P. ) stellata lacunosa. The branchio-cardiac depression 
is deep, and another depression runs along the outer side of the branchial region, adjacent to the 
marginal teeth. The elevated part of this region has a row of large pits through its middle, and similar 
lines of pits dividing the gastric region in three and roughening the chelipeds. The granules are in 
large part confluent and thus obliterated, especially on the higher parts of the carapace and the cheli- 
peds. The legs have smooth surfaces, thin cristate margins which are somewhat crenate or dentate in 
the merus and are destitute of long hair. Along with two of this variety from station 4100 is one 
which is intermediate between the typical and varietal form, the stellate granules being everywhere 
fairly well shown, and also the lines of pits. 
Still a third form seems worthy of a distinguishing name, P. (P.) stellata complanata. It differs 
from the type in the surface of carapace and chelipeds being smooth to the naked eye, though under 
the lens finely punctate and roughened; the elevations which in the other forms are crowned with a 
tubercle or spine are here low and smoothly rounded; the tubercle or spine at the inner third of the 
postero-lateral margin is represented by a triangular nodule; tubercle at each end of posterior margin 
large and round; antero-lateral teeth broader and more dentiform than in other forms; no teeth nor 
spines at outer end of postero-lateral margin, but a nodule on the dorsal surface at that point may 
represent them; marginal spines of chelipeds inclining to sharp; legs approaching the type in rough- 
ness; margins prominently spinate, without long hair. 
Distribution. — South coast of Oahu Island, 238 to 52 fathoms, station 3811 (type locality), 1 male 
(Cat. No. 29839); south coast of Molokai Island, 169 to 182 fathoms, station 3835, 1 female lacunosa; 
west coast of Hawaii Island, 198 to 147 fathoms, station 4045, 1 male lacunosa type (Cat. No. 29842), • 
1 male .sharp-spined variety; Pailolo channel, 130 to 151 fathoms, station 4100, 2 male lacunosa, 1 male 
intermediate; northwest coast of Oahu Island, 154 to 195 fathoms, station 4114, 1 small female lacunosa; 
vicinity of Kauai Island, 257 to 312 fathoms, station 4132, 2 male complanata, type (Cat. No. 29845).-. 
This species can be told at once by its very broad form, stellate granulation, and in the variety by 
the lines of pits. 
The type specimen has several stalked barnacles attached and also a worm tube adherent to the 
Whole length of outer surface of right or larger cheliped. A much smaller individual from station 
4045 representing the sharp-spined variety has also a barnacle on the carapace. 
