390 



Rostrum acute, pointed, narrow, reaching to the middle or just beyond the middle of 

 the visible part of i^' antennular article, separated by a concave emargination from the rounded, 

 unarmed, anterior border of the orbits. Width of the orbital region two-thirds that of the anterior 

 maro-in of the carapace. Rostral carina continued to the middle of the carapace, 

 interorbital part slightly concave, concealed in a lateral view by the orbits and presenting a 

 prominence just behind the base of the orbital hoods, which prominence is, however, so 

 small that it may easily be overlooked; it is twice as far distant from the posterior margin 

 of the carapace as from the tip of the rostrum, the extremity of which is curved downward. 

 In the male from Stat. 273 the rostral carina appears rather obtuse, in the adult females 

 somewhat sharper; in the young female from Stat. 77 it is rather obtuse posteriorly to the 

 corneae and the small prominence is inconspicuous. The interorbital part is separated from the 

 orbits by narrow, moderately deep grooves. 



This species is easily recognizable by the fine pubescence of the carapace, which 

 is rather thickly covered with short hairs, 0,06 — 0,1 mm. long; orbital hoods nearly glabrous. 

 Abdomen smooth and glabrous, pleura rounded below. Telson of the male not yet twice as 

 long (3 mm.) as broad anteriorly (1,64 mm.), distance (1,08 mm.) between the postero-lateral 

 angles two-thirds the greatest width ; spinules of the upper surface large, anterior pair a little 

 farther distant from the posterior margin than from the base, upper surface faintly furrowed 

 longitudinally on its anterior half. 



Second article of the pubescent antennular peduncle in the male half as thick as long, 

 little — in the adult one-sixth, in younger specimens one-fourth or one-third — longer than the 

 visible part of the first, third article three-fifths of the second; in the egg-bearing female from 

 Makassar the width of the second article is little more than one-third of its length and this 

 article is one-fourth longer than the visible part of the first. Stylocerite terminating in a spine 

 that reaches to the end of first article. 



Spine of the basicerite small, shorter than the stylocerite. Carpocerite as long as the 

 scaphocerite, extending beyond the antennular peduncle by two-thirds of the 3"' article. The 

 scaphocerite, the greatest width of which is one-third of its length, is fringed with long setae 

 and gradually narrows distally ; the outer margin is concave and the terminal spine, almost 

 half as long as the scaphocerite, exceeds the tip of the blade by one-fifth of its length, the 

 point being curved inward. 



External maxillipeds reaching as far forward as the antennal peduncles, penultimate joint 

 one and a half as long as thick, terminal joint twice as Jong as the penultimate and 4-times 

 as long as broad, in a lateral view; the truncate extremity bears a tuft of setae, that are 

 twice as long as the joint itself. 



Merus both of the larger and of the smaller cheliped of the male 2,5-times as long as 

 broad, upper margin unarmed at apex, infero-internal margin armed with 4 or 5, short, movable, 

 spinules and, at the far end, with an acute tooth. Carpus with a small, acute tooth at the 

 infero-internal angle. Large chela one-third longer than the carapace, resembling that of 

 A. Miersi, high, the proportion between length and height being 2,4; fingers little shorter 

 than the palm, the latter 1,3-times as long as the former. The upper border of the palm which 



258 



