﻿390 The Philippine Journal of Science ish 



uninjured individual has these appendages well developed. The 

 body length of the latter is 58.5 millimeters and the carapace 

 length, 18.5 millimeters ; the other has a body length of 66 milli- 

 meters and a carapace length of 20 millimeters. The following 

 description applies to the smaller specimen: 



The rostrum extends slightly beyond the middle segment of the 

 peduncle of the first antenna, and the first tooth on the dorsal 

 border is 7 millimeters posterior to the anterior edge of the 

 carapace. Five teeth are situated on the carapace, and these 

 are more widely separated from one another than those anterior 

 to them. The dorsal border dips anteriorly, showing only a 

 slight convexity over the eye. The lateral ridges of the rostrum 

 divide the lateral surface into an upper, wider region and a 

 lower, narrower region. The dental formula of the specimen 



10 -to 



under consideration is ~, while that of the other is ±£ 



2 2 



Three-fifths of the carpus of the first pair of legs extends 

 beyond the tip of the antennal scale. 



The chelipeds are decidedly unequal in length and different 

 in form, the larger being much longer than the body. One- 

 half of the merus of the larger (left) and one-fifth of the merus 

 of the smaller extend beyond the antennal scale. The slightly 

 gaping fingers of the large cheliped are much longer than the 

 palm, the length of the mobile finger being 25 millimeters and 

 that of the palm 16 millimeters. The toothing of the fingers 

 agrees well with Coutiere's description and figures. At the 

 proximal end of the immobile finger close to the articulation of 

 the mobile finger with the palm are 4 rather indefinite teeth on 

 a short ridge, which is a continuation of the cutting edge. Fol- 

 lowing this is a short space along the cutting edge which is 

 without teeth. At the end of the space is a well-developed obtuse 

 tooth, beyond which a distinct keel is seen extending to the tip 

 of the finger. Along the inner side of this keel, but not arising 

 from it, is a series of 16 anteriorly directed, acute teeth which 

 are placed at somewhat regular intervals. On the outer side of 

 the keel is another series of 14 teeth similar to the one just men- 

 tioned, but the teeth have their origin from the side of the keel. 

 At the proximal end of the mobile finger are 3 blunt teeth, the 

 posterior 2 of which meet the short raised ridge of the immobile 

 finger. The mobile finger extends beyond the immobile finger. 



The oval palm, which is much wider than the carpus, measures 

 16.5 millimeters in length. 10.5 millimeters in width, and 6 milli- 

 meters in thickness. The carpus (17 millimeters) is slightly 



