548 DB. J. Q. BE MAN ON CRUSTACEANS [DeC. 12, 



As regards the two spines on the carapace and the telson, the 

 female agrees with the male. The short flagellum of the internal 

 antennae, when put back, reaches to the 1st tooth of the upper 

 border of the rostrum. 



The legs of the 1st pair agree also with those of the male ; the 

 chela extends beyond the antennal scales and is distinctly more 

 than half as long as the carpus. 



The legs of the 2nd pair are subequal, the left (PL XYIII. fig. 1 3) 

 being very little larger than the right. Thej^ shoAv a less stout 

 shape than those of the male, as is proved by the measurements. 

 For example, the width of the distal end of the carpus is but one- 

 foitrth of its length, and the palm is also less broad in pi'oportion 

 to its length. The dactylus carries one small obtuse tooth at the 

 end of the sharp cutting-edge (fig. 14), at one-third of the length 

 of the finger from the articulation, and four smaller teeth, also 

 obtuse, posterior to it ; the fixed finger carries one single tooth 

 at the end of the cutting- edge. These legs are also covered with 

 small, slender spinules ; those on the inner margin of the palm 

 are moi/e pi'ominent than on the outer and more numerous than 

 on the upper and lower surfaces. The ambulatory legs (fig. 15) 

 are also slenderer than in the much larger male. 



When, however, the legs of the 2nd pair are compared with a 

 female from Kadjang of the same size which belongs to the tj'pical 

 form (de Man, I. c. 1892, p. 449), then they appear in the female 

 from Christmas Island distinctly stouter, especially the carpus. 



The male from the River Palopo (p. 545) is 75 mm. long. The 

 rostrum (PI. XYIII. fig. 16) reaches to the extremity of the an- 

 tennal scales. The upper border, which is slightly arcuate above 

 the eyes, carries 7 teeth ; the 2nd tooth, situated above the frontal 

 border, is a little longer than the four following, which are sub- 

 equal ; the foremost tooth is longer than the preceding and almost 

 twice as far distant from the penultimate tooth as from the 

 slightly upturned tip. The two teeth of the lower margin are 

 situated below the 5th and the 6th of the upper border. The chelae 

 of the 1st pan- are barely half as long as the carpus. There is but 

 one leg of the 2nd pair (fig. 17); this leg has a mtcch slenderer 

 shape tha.n those of the male from Christmas Island (confer the 

 measin-ements). The carpus is, at the distal end, comparatively 

 only hcdf as thick as in that specimen. The ambulatory legs 

 (fig. 19) are also much slenderer than in the male from Christmas 

 Island. 



I do not wish to go further into this question, but, at first 

 siglit at least, it aiDpears probable that under the name of Pal. lar 

 Fabr. two different species are confounded. The following may, 

 however, be added. 



Specimens lying before me from a river near Mbawa in the 

 island of Flores (de Man, I. c. 1892, p. 449) belong certainly to 

 the same form as the male from Christmas Island. A male 

 71 mm. long fxilly agrees with it, as regards the shape and the 

 chai'acters of the rostrum and of the ambulatory legs (the 2nd 



