402 



the posterior pair a little farther distant from the anterior pair than from the posterior margin 

 or just as far distant. In the adult specimen from Stat. 19 the lateral spinules are missing, but 

 in the other, younger specimen the longer inner spinules reach almost to the end of the telson. 

 The two spines of the basal joint of the uropods are very small, especially the outer, which 

 sometimes even is wanting entirely; the uropods are little longer than the telson. 



Second antennular article slender, 5-times as long as thick in the middle, almost twice 

 as long as the visible part of the 1^'; in the young female from Sapeh-bay, long iS mm., it 

 appears but little longer than the 1='. Stylocerite a little shorter than basal article, terminating 

 in a slender spine, that is turned outward. 



Spine on the basicerite small. Carpocerite hardly reaching to the end of second antennular 

 article. Scaphocerite slender, a little shorter than the antennular peduncle, ter- 

 minal spine as in A. inacroscclcs, hardly reaching beyond the obtuse tip of 

 the blade, stout, its width at base being one-third its length (Confer: H. 

 CouTiERE, Bull. Soc. Entom. France, 1898, p. 32, fig. 3'); outer margin of the scaphocerite very 



• slightly concave. 



External maxillipeds slender, as long as the antennular peduncle; penultimate joint 

 appearing, in a lateral view, 3-times as long as thick distally, terminal joint one and a half 

 as lono- as the penultimate, tapering, seven times as long as broad at its base and with obtuse 



extremity. 



Thoracic legs as slender as those of A. macrosceles and A. Talismani. In the adult 



male from Stat. 19 the large cheliped, 24,5 mm. long, appears a little shorter than the body. 



The merus, 6,8 mm. long, reaches as far forward as the antennular peduncle and its form is 



slender, for it appears six times as long as broad in a lateral view; the upper margin is 



unarmed, without a spine near the far end, the infero-internal margin carries a few finely- 



aciculiform spinelets and a somewhat larger one at the distal extremity, the longitudinal ridge 



on the lower face and the infero- external margin are beset with small, acute granules, that 



exist also here and there on the outer face like also on the ischium. Carpus short, nearly one 



and a half as long as thick. Chela, 12,9 mm. long, almost one and a half as long as the 



carapace and almost twice as long as the merus, slender, six times as long as broad 



(hicrh), the greatest breadth situated at the proximal fourth; the palm, that measures nearly 



two-thirds the length of the chela, viz. 8,3 mm., is slightly compressed, about in the proportion 



of 4 : 3 and it decidedly tapers towards the articulation of the fingers. Both the upper and the 



lower border of the palm are obtuse, fringed, like in other species, with hairs at the inner side 



and they are entire; the slightly convex, outer and inner surfaces show no carinae, ridges 



or depressions at all, but they are finely granulate, especially the inner. Fingers measuring 



little more than one-third the length of the chela and three-fifths that of the 



palm, slender, compressed and smooth; dactylus carinate above, obtusely pointed and a little 



shorter than the immobile finger, the tip of which is more acute; the dactylus bears in the 



middle an elongate, concave prominence that fits into a hole of the other finger. 



The large cheliped of the female resembles that of the male, but is shorter, the chela 



being hardly longer than the carapace. 



270 



