278 DR. J. G. DE MAN ON THE PODOPHTHALMOUS 
very acute, and is scarcely longer than the short eye-peduncles, 
and does not reach to the distal end of the first (antepen- 
ultimate) joint of the peduncle of the internal antenne. 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 small, acute, antennal spiie, 
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 ciliz being also 
found between the four spines of the posterior margin. 
The peduncles of the internal antennez are as long as, or 
scarcely longer than, the basal scales of the external antenne ; 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 ; 
T 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 antennz 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 
