rx, d, 4 Coivles: Palaemons of the Philippine Islands 363 



as one-fifth or one-third of the dactyli may extend beyond. The 

 propodus of the fifth leg (No. 1) measures 0.5 millimeter in 

 diameter at its middle and 8.75 millimeters in length. Similar 

 measurements for Nos. 24, 25, and 38 are 0.8 by 15, 0.3 by 7.5, 

 and 0.6 by 13 millimeters, respectively. 



Telson. — Specimens in which the telson has not been worn 

 show the internolateral spines extending about two-thirds of 

 their length beyond the acute median spine. The externolateral 

 spines are short and of about the same length as the median 

 spine. In some specimens the tip of the telson is worn and the 

 internolateral spines are considerably shortened. 



Character of surface. — The carapace and abdominal somites of 

 all females and males (Nos. 1 to 13, inclusive) are smooth to the 

 touch, and show no spines under a lens. Male specimens larger 

 than these have patches of spinules on the carapace, pleura of 

 abdomen, tergum of sixth somite, upper surface of uropods, and 

 the telson. These spinules are especially numerous on the young 

 mature males, and the surface is distinctly rough to the touch. 

 The surface of the first pair of legs is smooth, except in the old 

 males where the ischium and part of the merus are covered with 

 a few spinules. The spines on the chelipeds make their appear- 

 ance at an early age. Specimen 1 shows a few rather indistinct 

 rows of spines on the palm and distal half of the carpus. The 

 area of spines increases with the body length, so that in No. 4 

 it covers the proximal end of the finger, the palm, the carpus, 

 and the distal half of the merus. In No. 8 the condition is 

 similar except that the ischium also is covered. Young mature 

 males, as an example, No. 20, show a few spines at the proximal 

 end of the fingers and about 12 longitudinal rows of medium- 

 sized spines, which are distributed on the inner, ventral, and 

 dorsal surfaces of the palm. The outer surface of the palm is 

 covered with innumerable very small spines, which are not 

 arranged regularly in rows. A similar condition exists on the 

 carpus, merus, and ischium. The dorsal and ventral "linear 

 spaces" are visible especially on the palm, carpus, and merus. 

 In middle-sized specimens the "linear spaces" are more con- 

 spicuous. The third, fourth, and fifth legs are smooth in all but 

 the largest males, where the propodus, carpus, and sometimes the 

 merus are covered with very minute spinules. 



Eggs. — The eggs of this species when preserved are almost 

 spherical, and average 0.5 by 0.46 millimeter. 



Color of the living specimens. — The general surface of the 

 body owes its color mainly to the layer of pigment cells under 

 the transparent chitinous covering. The color is not always the 



