370 The Philippine Journal of Science 1914 



third confluent tooth and the first or most anterior confluent 

 tooth is almost separated from those back of it. The large 

 tooth of the immobile finger measures 1 millimeter in height, 

 and the teeth of the mobile finger are about half as high 

 (No. 8). 



The palm is cylindrical in cross section, and is always shorter 

 than the carpus. The proportion of the palm to the carpus 

 in the smallest specimen is 1:2, and in the largest mature male 

 the length of the palm is contained about one and one-third 

 times in that of the carpus (No. 8) . 



The carpus reaches it greatest diameter some distance posterior 

 to the distal end in mature males, and is cylindrical in cross 

 section. In all of our specimens it is shorter than the propodus, 

 but only slightly so in the immature specimens (Nos. 1-6). 



The proportion of the merus to the carpus ranges from 

 1:1.37 to 1:1.76. The former is always longer than the fingers, 

 and it is longer than the palm except in the mature males 

 (Nos. 7 and 8). 



Third, fourth, and fifth legs. — In the smallest male the 

 dactylus of the third leg, one-fourth of the propodus of the 

 fourth, and one-half of the propodus of the fifth leg extend 

 beyond the antennal scale. The propodus of the fifth leg meas- 

 ures 8 millimeters in length, and has a width of 0.33 millimeter 

 at its middle point. One-half of the propodus of the third 

 leg extends beyond the tip of the antennal scale in the largest 

 male, and one-third of the same segment of the fourth and 

 fifth legs overreaches the scale, The measurements for the 

 propodus of the fifth leg are 11.5 by 0.5 millimeters. 



Telson. — The telsons of the two largest males and the smallest 

 male are damaged. The tip in uninjured specimens is sub- 

 acute, the externolateral spines fail to reach the tip of the telson 

 by a distance equal to their own lengths, and the internolateral 

 spines extend with three-fifths (No. 7) and two-thirds (No. 1) 

 of their lengths beyond the tip. 



Character of the surface. — The carapace and abdominal 

 somites of all specimens except the two largest males, Nos. 7 and 

 8, are smooth. The last-mentioned mature males have the usual 

 spinules on the pleura of the abdomen, the tergum of the sixth 

 somite, the uropods, the telson, and the carapace. No spines can 

 be seen on the legs of the smallest specimen. The surface of the 

 first legs is smooth in all individuals except in the two largest 

 males, where a few spines may be seen on the ischium. The 

 chelipeds of No. 1 are smooth, and in No. 2 a few spinules 

 may be seen on the immobile finger, the palm, and the car- 



