262 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 



The larger specimen is 66 millim. long from the tip of the 

 rostrum to the end of the terminal segment of the abdomen. 

 The first (i. e. the anterior) joint of the internal antennae mea- 

 sures only a third of the length of the second joint, and the latter 

 is twice as long as the third or antepenultimate joint. The 

 antennal scale is a little longer than the peduncle of the in- 

 ternal antennae, the difference in length being almost equal 

 to the length of the first (anterior) joint of the antennules ; 

 the peduncle of the external antennae is also shorter than the 

 antennal scale. 



The rostrum is acute and short, not reaching as far forwards as 

 the anterior end of the antepenultimate (or third) joint of the anten- 

 nules ; between the eyes it is very narrow, linear, and carinate, 

 being separated from the eyes by rather deep depressions in the 

 surface of the carapace. The rostrum extends but little back- 

 wards behind the eyes, so that its whole length scarcely mea- 

 sures a fifth of the length of the carapace. The outer maxilli- 

 peds, clothed with long hairs at their extremities, project much 

 beyond the antennal scales, almost reaching to the middle of the 

 thickened portion of the outer (upper) flagella of the internal 

 antennae. 



The larger chelipede, situated on the left side and about 

 50 millim. long, is more than twice as long as the carapace, but 

 shorter than the distance from the tip of rostrum to the end of 

 the terminal segment of the abdomen. The upper margin of the 

 arm, in both chelipedes, is unarmed, and never presents a spine at 

 itsdistal end ; the inner margin of the under surface, however, 

 presents some small acute teeth along its whole length, the distal 

 oneo f which is the longest of all, especially on the larger (or left) 

 chelipede. The' larger hand, which is almost three times as long 

 as broad, and which measures 30 millim., is strongly compressed 

 laterally, and has a prismatic form. The fingers are distinctly 

 shorter than the palm ; the mobile finger measures 13 millim., 

 and the upper margin of the palm 17 millim., so that the fingers 

 are a little shorter than half the length of the whole hand. The 

 outer surface of the palm is smooth and glabrous, and has no 

 longitudinal crests, although it appears slightly concave at the 

 base of the immobile finger. The inner surface of the palm is 

 also smooth, but is clothed with some hairs, especially along its 

 upper and under margins. The upper margin of the palm is 



