ix, d, 4 Cowles: Palaemons of the Philippine Islands 393 



of which 4 are situated on the carapace. The first and second 

 teeth, and in some other specimens also the second and third, 

 are more widely separated from one another than the rest. 

 Anteriorly the dorsal border dips, but there is scarcely any con- 

 vexity over the eye. On the lower border are 3 teeth, sometimes 

 4 in other specimens, and the tip of the rostrum does not turn 

 upward. The posterior part of the lateral ridge on the rostrum 

 should be shown slightly higher up than it is in the figure (Plate 

 III, fig. 8). One-sixth of the carpus of the first pair of legs 

 extends beyond the antennal scale, and the outer maxillipeds 

 reach slightly beyond the peduncle of the second antenna. 



The chelipeds are decidedly unlike in form and unequal in 

 length, the larger being much longer than the body. One-sixth 

 of the merus of the larger and one-third of the carpus of the 

 smaller cheliped extend beyond the antennal scale. Measuring 

 in a straight line from the articulation of the mobile finger (large 

 cheliped) to the tip of the same, the length is 20 millimeters. 

 This finger is strongly curved inward, it is compressed laterally 

 throughout its extent, and crosses the tip of the immobile finger 

 when the fingers are closed. Near the proximal end of the mobile 

 finger, along the cutting edge, are 3 small, closely set teeth, 

 which are followed distally by 2 somewhat larger teeth. Beyond 

 these, 5 teeth are seen which gradually decrease in size, until 

 near the tip the last one is nothing more than an inconspicuous 

 tubercle. The immobile finger is strongly compressed laterally, 

 its outer surface is decidedly concave near the palm, and its- 

 proximal end is much wider than that of the mobile finger, about 

 2:1. Near the proximal end of the cutting edge is a com- 

 paratively large tooth, which curves inward ending in an acute 

 tip. This is followed by 7 smaller teeth, which become almost 

 like tubercles near the tip of the finger. A few scattered hairs 

 may be seen on both fingers, but at the proximal end of the mobile 

 finger and on its lower surface there is a small dense patch of 

 hairs. 



The palm, which is strongly compressed, measures 30 milli- 

 meters in length, 12.5 millimeters in width at its widest point, 

 and 6.5 millimeters in thickness in the same region. From these 

 figures it will be seen that the palm is one and one-half times as 

 long as the finger and that the ratio of the thickness of the 

 palm to the greatest width is about 1 : 2. 



The carpus, which is practically cylindrical in cross section and 

 much narrower than the palm at its distal end, measures 25.5 

 millimeters in length, thus being shorter than the palm. 



