151 



unarmed, almost 3-times as long- as thick; menus 1,8-times as long as the preceding joint, 

 cylindrical, 5 -times as long as wide. Carpus 3-times as long as thick at the distal extremity, 

 much shorter than the merus, which is 1,54-times as long as the carpus. Chela 4-times as lono- 

 as high, just as long as the merus and 1,6-times as long as the carpus. Fingers measuring a 

 little more than one-third of the chela, the proportion between the length of the chela and 

 that of the fingers being 2,73; fingers tapering, unarmed, excepting a very small tooth just 

 near the tip of the immobile finger. 



Merus of second legs, in the male, 4, 3-times as long as wide. Carpus 1,36-times as 

 long as the merus and 9-times as long as thick near the articulation of the chela ; first segment 

 0,84 mm. long, slender, 5, 4-times as long as thick at the distal extremity; the four following 

 segments, the three first of which are very short and equal, are together just as long as the 

 first; fifth segment twice as long as thick distally and 0,35 mm. long. Chela 0,66 mm. long, 

 a little more than one-third of the carpus, fingers a little shorter than the palm. In the female 

 the merus is 4,7-times as long as wide, the carpus 1,35-times as long as the merus and 

 I I -times as long as thick near the articulation of the chela; the first segment, which is 6-times as 

 long as thick distally, appears a little longer than the sum of the four following, viz. 1,1 6-times ; 

 fifth segment measuring just one-fifth the length of the carpus, chela almost twice as long. 



Ischium of third legs with a movable spine near the base; propodus in the male with 

 7, in the female with 6 very short spinules and a much stronger spine, 0,21 mm. lono-^ at 

 the distal extremity, this spine being half as long as the dactylus. Dactylus tapering, simple, 

 5-times as long as wide at its base, measuring in the female just one-third of the propodus, 

 in the male a little less, the propodus being in the male 1,61 mm. long, the dactylus 0,48 mm. 



Table. 



Relative dimensions of 



of the third legs 



cT 

 1,66 



I 



1,8 



4,3 

 8 



9 



I 

 1,76 



4,3 

 8 



Merus 



Carpus 



Propodus 



Proportion between the length and the width of the merus . 

 Proportion between the length and the width of the propodus 



Ova numerous, small, 0,42 — 0,45 mm. long. 



Length of the male 10,5 mm., of the female 9,5 mm. 



Remarks. Atha^ias HasweUi Cout. from the South Adelaide coast is related to this 

 species, but the legs of the first i^air of the female seem to be equal, and the proportion 

 between the length of the chela and that of the carpus is 0,85, in the small cheliped of the 

 female of Ath. Minikoensis, however, 0,63. 



f 3 Athanas Sibogae de Man. 



J. G. DE Man, in: Tijdschr. d. Ned. Dierk. Vereen. (2) Dl. XI. 19 10, p. 314. 



Stat. 37. March 30/31. Sailus ketjil, Paternoster-islands. 27 m. and less. Coral and coralsand. 

 3 young specimens. 



19 



