300 
The investigation of the animal gave the following results as 
to the body: 
The la brum is bullate, but has no furrow nor notch; neither 
are hairs or denticles present. The palpae are short and trunc- 
ated (Fig. 47). The man di ble has three large, almost equidis- 
Fig. 47. Catophragmus Pilsbryi from Taboga, Panama, a labrum with palpae, from 
above, 1) mandible, c maxilla, d caudal appendage. [X 22]. 
tantly placed teeth; the lower angle is pointed, and strongly pec- 
tinate. The surface is all but destitute of finer hairs. 
The maxilla has two large upper spines, below these latter 
one pair of smaller spines, and then a small, but distinet notch. 
The lower part of the cutting edge is straight, and armed with 
several strong spines; the lower angle is a little protruded, and 
armed with a brush of bristles. A crest is seen at the upper margin 
in the posterior part of the blade. Only some few hairs are present 
at the upper and lower margins. 
Cirrus I and II are shoit, the posterior cirri longer and of al¬ 
most equal size; all the cirri are stout. The numbers of segments 
are : 
Cirrus 
I 
II 
III 
IV 
V 
VI 
Cirri of the 
| inner 
ramus 
8 
9 
19 
23 
22 
22 
right side 
| outer 
11 
11 
18 
21 
22 
23 
Cirri of the 
J inner 
9 
9 
21 
22 
21 
21 
left side 
| outer 
12 
10 
20 
23 
23 
23 
