ix, d, 4 Cowles: Palaemons of the Philippine Islands 399 



two-thirds of the palm, measures 15.5 millimeters in length, thus 

 being a little more than one-half as long as the palm. There 

 is a fairly thick coating of long hairs over the entire carpus. 



The shape of a cross section through the merus differs at 

 different points. When seen from above, the outer border is 

 almost straight and the inner border forms a line shaped like 

 an elongated S. The merus, which is covered with a thick coat- 

 ing of long hairs on its inferior, inner, and superior surfaces, 

 measures 18 millimeters in length, and is much longer than the 

 greatly compressed ischium. The latter is only 7 millimeters 

 in length along its longest border. 



Anteriorly directed, closely set, flattened spines which give 

 only a sensation of slight roughness when the finger is rubbed 

 over them are present upon the inferior border of the palm. On 

 the inner and outer lateral regions and the superior border these 

 are even smaller in size. These spines extend about halfway 

 out on the fingers, but beyond this the latter are smooth so far 

 as spines are concerned. Spines similar to those of the palm are 

 present on the carpus, merus, and ischium, but they are better 

 developed, and on the inner surfaces of these members they are 

 comparatively long and sharply pointed. No "linear spaces" can 

 be detected. 



The large cheliped of the smaller specimen differs mainly from 

 that of the longer specimens in the shape and size of the fingers 

 and in the proportion of the width of the palm to its length. 

 The mobile finger is much less strongly curved, and the palm is 

 narrower in proportion to its length. 



The smaller cheliped (left) of the large specimen has widely 

 gaping fingers; the mobile one measures 15.5 millimeters in 

 length, and the immobile one is slightly shorter. Along the cut- 

 ting edge of both fingers is a dense growth of stiff hairs and a 

 slightly developed keel. Near the proximal end of the mobile 

 finger are 5 low blunt teeth followed by a short space, at the 

 end of which there is a larger and more acute tooth; beyond 

 this no tubercles or teeth can be seen. At the proximal end of 

 the immobile finger is a short ridge on the cutting edge, remind- 

 ing one of a similar structure on the large cheliped ; in the former, 

 however, it shows indication of breaking up into small teeth. 

 Beyond this ridge and very close to it is a large anteriorly di- 

 rected tooth similar in shape to the one on the immobile finger 

 of the large cheliped. As in the case of the mobile finger, there 

 are no tubercles or teeth beyond the large tooth just mentioned. 

 The palm measures 10.5 millimeters in length, 5 millimeters in 

 width, and 4 millimeters in thickness. The carpus is not so 



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