278 DE. J. G. DE MAN ON THE PODOPHTHALMOTJS 



very acute, and is scarcely longer than the short eye-peduncles, 

 and does not reacli to the distal end of the first (antepen- 

 ultimate) joint of the peduncle of the internal antennae. It 

 arises from the anterior third of the cephalothorax, with a 

 small carina, which, however, does not extend to the middle 

 of the cephalothorax ; the rostrum is quite unarmed below, but 

 armed on its upper margin with three acute teeth, directed for- 

 wards. The first tooth is placed on the carapace, at a distance of 

 about a fifth of its length from the anterior margin ; the second 

 or middle tooth is found on the rostrum itself, immediately before 

 the anterior margin of the carapace, and the third tooth quite on 

 the middle of the rostrum, its distance from the acute tip being a 

 little longer than its distance from the second tooth (fig. 2). The 

 distance of the first tooth from the second finally is a little longer 

 than the distance of the third to the tip. The anterior margin 

 of the cephalothorax is armed with a aniall, acute, anteuual spine, 

 the point of which is situated quite below the middle of the 

 distance between the tips of the two anterior teeth of the rostrum. 



The terminal postabdominal segment tapers gradually and 

 considerably to its distal end, which is truncated, straight, and 

 armed with four spines ; the two median spines are a little 

 longer than the posterior margin of the segment and more than 

 twice as long as the lateral spines ; the upper surface of the 

 segment is armed with two pairs of small spines, and the distal 

 halves of the lateral margins are ciliated, some cilise being also 

 found between the four spines of the posterior margin. 



The peduncles of the internal antennae are as long as, or 

 scarcely longer than, the basal scales of the external antennae ; the 

 first joint is somewhat longer than the rostrum, the second is a 

 little shorter than the first, and the third or anterior joint is 

 scarcely half as long as the second. The first joint is armed at 

 the distal end of its upper margin with two very small spinules, 

 and the second joint with one spinule at its distal end : the 

 flagella are broken in part, so that I cannot describe their length ; 

 I may remark, however, that they are thin, the one scarcely thicker 

 than the other, and that each of their joints is provided with one 

 or two very short hairs, which can only be observed by means of 

 a microscope (fig. 3). 



The peduncles of the external antennae are almost as long 

 as those of the internal ; their flagella are broken and lost. 

 The basal scales are nearly as long as the peduncles, being but 



