CBT7STACEA OF THE MERGUI ARCHIPELA.GO. 87 



internal margin, and three in the external row, the proximal of 

 the latter being found at the articulation with the wrist. The 

 distal spines are situated above the articulation of the mobile 

 finger. The outer surface of the hands presents three longi- 

 tudinal parallel ridges, one below and near the under margin, and 

 continued upon the immobile finger, the second on the middle 

 of the outer surface, and the third, proceeding parallel to the 

 second, from the proximal spine of the external row of the upper 

 margin up to the middle of the palm. In the adult specimen 

 these ridges are smooth, in the younger individuals often 

 minutely granular. The outer surface of the palm, its convex 

 under surface, and the inner surface, which also presents 

 a more or less distinctly indicated longitudinal ridge on the 

 middle, are smooth ; but the upper surface of the palm is 

 minutely granular ; the dorsal ridges on the upper surface, 

 which terminate in the spines, are also somewhat granular. On 

 the hand of the smaller ehelipede of the adult specimen these 

 granules are less distinct. The fingers are similar to those of 

 G. annulatum, Eabr. 



The three succeeding pairs of legs are a little more slender than 

 those of Gr. annulatum, Fabr., the joints being slightly more 

 elongated. Thus the propodites of the legs of the third, or middle, 

 pair are thrice as long as broad ; in G. annulatum, however, they 

 are scarcely more than twice. The dactylopodites are also more 

 slender. 



The natatory legs are similar to those of G. luciferum=^ G. qua- 

 drimaculatum. The merus-joint is about twice as long as broad, 

 slightly longitudinally grooved near the anterior and again near 

 the posterior margin, which is armed near the distal end with a 

 strong spine. The carpopodite is armed, as in G. spiniferum, 

 Miers, at the posterior margin of its under surface with an 

 acute backwardly directed spine. The penultimate joint or pro- 

 podite in all the specimens is denticulated along its posterior 

 margin, having 7-9 acute spinules. The flattened terminal joint 

 has a small spinule at its distal extremity. 



Like the cephalothorax, the legs are also covered with a close 

 pubescence, while the more prominent parts, such as the ridges 

 and spines, ares glabrous ; in many examples, however, this pubes- 

 cence has been worn ofl", 



