86 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
is still distinctly longer than the fifth. The postero-lateral margins 
are rather concave. 
The external antenne are long, and measure two thirds of 
the length of the cephalothorax ; their basal joint is armed with 
a minutely granulated, rounded, and little prominent crest. In 
G. acutum, A. M.-Edw., a species inhabiting the Japanese seas, 
and closely allied to our species, this crest is armed with two 
spines. 
The sternum and the abdomen are minutely punctate, 
but are quite smooth and glabrous. In its general shape 
the male abdomen resembles that of G. gquadrimaculatum 
(Archives du Muséum, tom. x. pl. xxxiv. fig. 3a). The terminal 
joint is triangular and equilateral ; the length of the penultimate 
joint is scarcely shorter than the breadth of its posterior margin, 
and the lateral margins of this joint are a little rounded and 
convex on their anterior half. In G. luciferum= G. quadrimacu- 
latum the penultimate joint is a little shorter, and it therefore 
appears slightly more enlarged. As usual, the lateral margins 
of the female abdomen are fringed with hairs. 
The anterior legs are rather short, extending with their distal 
half beyond the lateral margins. The anterior margin is armed 
with four spines, including a small spinule at the distal end (in 
the larger chelipede of the largest specimen, a fifth accessory 
spine is found between the two proximal spines, but this spine is 
certainly an abnormality). In many specimens, a small spinule 
is found at the distal end of the under margin inserted on the 
tuberculiform prominence which is there seen. The rounded 
posterior margin is slightly granular, but the rest of the arms 
is smooth. The wrist is armed with a long strong spine at its 
internal angle, and with three acute spinules on its outer surface ; 
the ridges on the outer surface, terminating in these spinules, 
are minutely granular. 
The hands are comparatively less swollen than those of @. 
annulatum. As regards the proportion of the length of the 
fingers to that of the palm, both species agree with one another. 
The larger hand of the largest. specimen is scarcely more than 
three times as long as it is high at the base of the fingers; the 
smaller hand is comparatively lower, and appears therefore 
slightly more elongated. The upper surface is armed with five 
spines arranged, as usual, in two rows; two are found on the 
