312 



a little shorter than the other, but almost 3 times as thick at 

 its base. 



25. Arete Iphiauassa, u, sp. 



Statiou 125. Ancborage off Sawan, Siau-island. Reef. 



A new species closely related to Ai^ete indicus Cout. Froiital 

 regiou and anteunular peduncle with tbe stylocerite as iu A. 

 indicus^ but the auterior margin of Ist and 2nd autennular article 

 finely denticulate and the outer fiagellum presenting, before bifur- 

 cation, four articles that are one and a half as long as thick. 

 Carpocerite stout, one and a half as long as wide, hardly as 

 long as antennular peduncle; scaphocerite as in A. mtZecws. Telson 

 resembling that of A. dorsalis Stimps., 4 times as long as the 

 posterior margin is wide; in the exopodite of caudal fan the 

 distal extremity of outer margin is not curved ontward. 



First pair of legs asymmetrical in the male, symmetrical in the 

 feiu'^le. Meropodite of larger chelipede in the male twice as long 

 as wide, palm and chela as in A. indicus, but the immobile finger 

 is armed in the middle with a strong, truncate tooth and with 

 another, smaller and obtuse, betweeu this tooth and the articu- 

 lation, while the dactylus bears, also in the middle, a rounded 

 tooth, situated between the two of the immobile finger and inter- 

 mediate in size. Small chela of the male as in A. indicus. In the 

 female the chelae resemble the smaller of the male, but the 

 fingers are a little shorter than the palm. 



Second legs of a stouter form than in A. indicus, meropodite 

 3,5 times longer than wide, Ist segment of carpus a little shorter 

 than the sum of the follovving and 3 times as long as thick 

 distal ly. 



Relative dimensions of 3rd pair in the male: Meropodite 2,1, 

 carpus 1, propodite 1,7. These joints have the same form as in 

 A. indicus, but the apical tooth of the meropodite is a little 

 larger and the propodite bears 12 spinules, in the female 8; 

 dactylus one third of the propodite, similar to that of A. indicus. 



