86 DE. J. G. DE MAN ON THE PODOPHTHALMOITS 



is still distinctly longer than tlie fifth. The postero-lateral margins 

 are rather concave. 



The external antennae 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. quadrimaculatum 

 (Archives du Museum, tom. x. pi. xxxiv. fig. 3 a). 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 bej'ond 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 G. 

 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 



