149 



as long as the merus, and 10,5-times as long as thick at its distal extremity; first segment 

 5 -times as long as thick at the distal extremity, shorter than the sum of the four following, 

 the proportion being as i : 1,33; second segment a little shorter than the third and the fourth 

 that are equal, the three segments longer than thick; the third and the fourth one and a 

 half as long as thick; chela nearly as long as the first segment, hardly a little shorter, fingers 

 as long as the palm. 



Ischium of third legs with a slender spine at the base of the posterior margin. Relative 

 dimensions of third legs: Merus 2; carpus i ; propodus 2,25. Merus 7-times, propodus 10,2-times 

 as long as wide, the latter with 6 short spinules on the posterior margin and a longer one at 

 the distal extremity, which is half as long as the dactylus and that measures one-seventh of 

 the propodus. Dactylus biunguiculate, one-third the length of the propodus, slender, 7-times 

 as long as wide near the articulation ; ventral hook a little more than half as long as the 

 dorsal or principal hook, slightly divergent, the anterior margin of the ventral hook being 

 not parallel with that of the other ; dorsal hook 3-times as wide at its base as the ventral. 

 Following^ leo's also biunguiculate. 



Ova 0,5 mm. long. 



Length of the single specimen collected 6,5 mm. 



Remarks. Apart from the first pair of legs, this species much resembles Ath. Slbogae\ 

 the merus of the second and following legs is, however, a little more slender, as also the 

 propodus of the three posterior legs and the dorsal hook is 3-times instead of twice as broad 

 at its base as the other. There are, however, still more differences. 



J 2. Athanas Minikoensis Cout. 



Athanas Minikoensis H. Coutiere, Alpheidae Maid, and Laccad. Archip. 1905, p. 858, Fig. 130. 



Stat. 125. July 18/19. Anchorage off Sawan, Siau-island. Reef, i egg-bearing female. 

 Stat. 169. August 23/25. Anchorage off Atjatuning, West-coast of New Guinea. Reef, i 

 adult male. 



In the male from Atjatuning the rostrum agrees with Coutiere's figure a and reaches 

 almost to the apex of the second antennular article ; the upper margin which is sharply carinate, 

 is slightly directed downward. Supra-corneal spine and infra- corneal spine also as in the type, 

 but the latter spine slightly less acute. In the female the rostrum, though reaching as far 

 forward, appears a little broader with regard to its length. 



Median antennular article one-fourth shorter than the visible part of the first and hardly 

 longer than the third ; stylocerite reaching to the distal extremity of the second article. Antennal 

 scale as long as the antennular peduncle, terminal spine just reaching beyond it; carpocerite 

 much shorter than the scale, 3-times as long as thick, measured at the lower side. 



Telson, in the male, 3,8-times as long as the posterior margin is wide, proportion 

 between the width at the base and that of the posterior margin 1,8; longer, internal spinules 

 of the posterior margin only a little shorter than the latter is broad and 3-times as long as 

 the outer, that reach as far backward as the end of the telson. Anterior pair of spinules of 



17 



SIBOGA-EXPEDITIE XXXIX'a. 20 



