i6 



12. Athanas Naifaroensis Cout. PI. II, Fig. 9. 



Athanas Naifaroensis H. Couticre, Alphcidae Maid, and Laccad. Archip., 1905, p. 859, fig. 131. 

 Stat. 213. September 26 — October 26. South-Island near Saleyer. Reef, i male. 



This specimen is 7,7 mm. long from tip of rostrum to end of telson, the carapace, 

 rostrum included, measuring 2,9 mm., the abdomen without the telson 3,9 mm., the teilson 

 0,9 mm. 



Rostrum 0,85 mm. long, almost half as long as the rest of the carapace, reaching (Fig. 9) 

 to the far end of 2"<i antennular article ; its greatest width, at one-third its length from the base, 

 0,23 mm., is almost one-fourth the entire length; from here to thfe base the margins are slightly 

 concave, parallel, while in front of it the margins, also a little concave, converge to the acute 

 tip. Supra-corneal spine reaching, looked at from above, to the middle of the eye, extra-corneal 

 spine very long, extending beyond the eye to the middle of the rostrum, infra-corneal spine 

 very small, hardly projecting beyond the eye. Second joint of antennular peduncle a little, 

 one-fifth, shorter than i''^\ stylocerite reaching to the far end of 2'"i. 



The measurements of the three posterior legs in millimeters are the following : 



Length of merus 



Width of merus 



Length of carpus 



Width of carpus at distal end 

 Length of propodus .... 

 Width of propodus .... 

 Length of dactylus .... 

 Width of dactylus at base . 



Third legs 



0,92 



0,2 



0,52 



0,15 



1,1 



0,125 



0,32 

 0,06 



Fourth legs 



0,74 



0,154 



0,4 



0,13 

 0,86 

 0,11 



0,28 



0,054 



Fifth legs 



0,74 

 0,16 



0.55 



0,126 



0,94 



0,115 



0,32 



0,06 



The relative measurements are therefore for the 3^*^ pair: merus 1,8, carpus i, pro- 

 podus 2,1-, for the 4"^ pair merus 1,85, carpus i, propodus 2,15; for the 5'*' pair merus 1,35, 

 carpus I, propodus 1,7. 



I would still observe that the dactylus of the measured leg of the 4''^ pair bears a very 

 small, ventral, accessory tooth just beyond the middle, its fellow of the 4"^ pair is lost, in the 

 other legs the dactylus is simple. 



The endopodite of the 2"<i pleopod bears two appendices, the appendix masculina 

 reaching almost to the apex of the branch and with 5 spiniform setae on the tip, the stylamblys, 

 which is much shorter and furnished with 6 cincinnuli. As the male of this species is still unknown, 

 it is to be regretted that the first j^air of legs are wanting. 



General distribution: Naifaro Reef, Hulule Male Atoll (Coutiere). 



13. A thatias parvus de Man. 



Athanas parvus J. G. de Man, Siboga Kxp., Monogr. 39^', Part II, Family Alpheidae, 191 1 

 (text) p. 14S, 1915 (plates) PI. I, Fig. 4—4"'- 



