174 ZOOLOGISCHE MEDEDEELINGEN — DEEL IV. 



usual regions, the cervical groove and two very short other ones 

 parting from either end being the only ones that are distinct. On the 

 surface of the front there are mere traces of two median postfrontal 

 lobes, and between them a very short mesial furrow. The whole sur- 

 face is finely punctate; I observed only some minute granules on the 

 sloping part of the branchial regions, and there is a curved granulated 

 row above the bases of the last pair of legs. Besides, there are four 

 rounded white spots, not tubercles, in a single transverse row on the 

 mesogastric region; the outer ones are sunk into rather deep pits. 



3° The anterior margin of the front measures about 37°/ of the maximum 

 breadth of the carapace in the case of the male, 35°/ in the female 

 (de Man, I.e., p. 152 — 153); the posterior border of the carapace is 

 about equal to this breadth of the front, which agrees with the pro- 

 portions found in P. subglobosus. The external angles of the front are 

 subacute, directed obliquely-outward; the median lobes are large and 

 broad, separated by a small, triangular incision. 



4° The epistome is longer in the middle than laterally, gut-like, and 

 bordered below by the usual granulated anterior border of the buccal 

 cavern; the latter is much broader anteriorly than behind, so that the 

 exognaths of the external maxillipeds (f. 3 c) are much diverging forward ; 

 these exognaths, as has been already observed by de Man and Alcock, 

 are much broader than the narrow ischia of these maxillipeds, and 

 do not reach as far as the anterior margin of the strongly auriculated 

 external part of the meri. 



5° The abdomen of the male has been accurately described by de Man 

 (p. 151): it is narrow and parallel-sided, the bases of all but the ter- 

 minal joint are subequal in breadth, and the abdomen does not occupy 

 all the space between the bases of the posterior legs. The penultimate 

 segment, that is the longest of all the preceding ones, is not so abruptly 

 narrowed as in the preceding species, so that its posterior margin is 

 less than twice that of the terminal segment; the latter is as long as 

 broad at the base and longer than the preceding joint, the side margins 

 are slightly concave and the tip is rounded. 



6° The chelipeds agree on the whole with those of P. subglobosus: the 

 meropodite is very short, with a much curved upper and a roughly 

 dentate inner and outer border, the external surface likewise, shows 

 transverse rugosities towards the upper border; the carpopodite is very 

 finely granulate, the inner angle is somewhat produced into a small 

 obtuse tooth, directed forward, but not exactly spiniform, as Alcock 

 says, and behind this angle there is a row of 4 — 5 small granules 

 running backward, near the base a small tuft of hairs is found, 



