202 



ZOOIvOGY OF THE FAR EAST. 



palm are thickly covered with small spinules which are larger on the inner and under 

 sides of the carpus and palm where they tend to form longitudinal rows. These 

 spinules are visible even in the smallest individuals. In the larger males and the 

 oldest female the fingers are thickly clothed with hair. There are two small teeth 

 on the inner margin of the dactylus near its proximal end and one similar tooth 

 which fits between them on the fixed finger. 



Seven specimens yield the following measurements :— 









a 



Second peraeopod 



; I^ENGTH OF 





















a 







0^ 















OJ 



J3 . 



Xi <u 



a 









en 





3 



>< 



o 



C IS 



■Sd2 



OJ Ph 





3 

 ft 



13 



t 



m 



H 



i-r 



>J 





§ 





 230 



Pi 



Q 



cC 



76 



17-5 



77 



I2-I 



15-2 



15-2 



107 



c? 



71 



17-3 



61-5 



10-4 



"•5 



i6-8 



I2-I 



8-3 



â 



53 



11-3 



42-5 



8-0 



8-0 



I2'4 



6-5 



6-4 



â 



43 



9-1 



32-0 



60 



6-2 



8-5 



47 



4-8 



9 



76 



21-3 



67 



124 



i4'o 



i8-6 



117 



8-1 



5 



57 



i3'5 



49 



8-8 



9-2 



14-2 



87 



6-3 



â 



82 



217 



121 



i6-8 



23-0 



40-5 



32-0 



II-6 



It is doubtful if the last of these specimens, which is separately referred to below, 

 is correctly referred to P. sundaicus. The measurements of the remainder tend to show 

 that in the course of growth the palm increases considerably in length in proportion to 

 the merus and fingers. In young males it is much shorter than the merus and little if 

 at all longer than the fingers, whereas in large males it is equal to or a little longer 

 than the merus and almost one and a half times as long as the fingers. 



In the male 76 mm. in length the carpus is 2-5 mm. in breadth at its distal 

 end and the palm 2-4 mm., the segments being respectively about nine times and 

 six and a third times as long as broad. In the female of the same length these 

 measurements are 2-3 mm. and 2-5 ram., the carpus being eight times and the palm 

 six and two thirds times as long as wide. 



If the figures tabulated above are analysed and compared with thtjse given in other 

 descriptions, certain small differences are evident ; these, however, do not appear to 

 be sufficiently well marked to afford any basis for the foundation of a subspecies- 

 In the males from the Tale Sap, for instance, the merus and carpus seem proportion- 

 ately a trifle longer and the palm and dactylus a little shorter than in those described 

 by de Man as P. sundaicus var.' and the same features may be detected if the Tale Sap 

 females are compared with de Man's typical P. sundaicus from the Java Sea.* 



I De Man, loc. cit., 1897, p. 783. 



s De Man, loc. cit., 1897, p. 782. 



