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the outer margin of which is slightly concave, is nearly as long as the carpocerite ; the terminal 

 spine reaches to the middle of second antennular article, projecting by one-third of its length 

 beyond the tip of the blade which is fringed with long hairs and which reaches almost to the 

 end of the antennular peduncle. Terminal joint of outer footjaws 4,5-times as long as broad, 

 gradually narrowing distally. 



The small cheliped of the male closely resembles that of ^4. euchirus 

 Dana, which species was formerly regarded by me, though at that time already with some doubt, 

 as a variety of A. HippotJioc de Man (J. G. de Man, in: Zoolog. Jahrb. IX, Abth. f. Syst. 

 1897, p. 754, Taf. 36, fig. 66 — 66<r and in: Notes from the Leyden Museum XX, 1898, p. 210). 

 The outer face of the merus is 2,6-times as long (4,1 mm.) as broad in the middle (1,56 mm.), 

 upper margin unarmed at the apex, infero-internal margin armed with two small spinules 

 and, at the apex, with a slender pointed tooth. Carpus with an acute tooth at the supero- 

 internal angle of its anterior margin. Chela just as long (8,2 mm.) as the carapace, rostrum 

 included, fingers hardly longer than the palm, which is twice as long as high and just as thick 

 as high ; the palm is slightly narrowed near the articulation of the fingers, though not notched 

 or emarginate and one observes a tracé of a feeble depression on the upper half of the outer 

 (inferior) surface. At either side of the articulation of the dactylus the palm terminates in a 

 subacute tooth, the tooth at the inner side is slightly larger than the other. Dactylus obtusely 

 carinate above from the articulation to the tip, its outer face smooth and almost glabrous, the 

 inner face presenting a hairy crest or ridge, like in the male of A. euchirus, and this crest 

 extends from the articulation to the distal third. 



Merus of second legs both in the male and in the female 7-times as long as broad ; 

 carpal segments in the male 2,45 mm., 0,95 mm., 0,52 mm., 0,47 mm. and 0,82 mm. long, chela 

 1,73 mm. long (palm 0,82 mm., fingers 0,91 mm.), the second segment 0,35 mm. thick in the 

 middle, 2, 7-times as long as thick. In the female the carpal segments are 2,5 mm., 1 mm., 0,6 mm., 

 0,5 mm. and 0,8 mm. long, chela 1,75 mm. long (palm 0,82 mm., fingers 0,93 mm.), the second 

 segment, like in the male, 2, 7-times as long as thick. The first segment of the stout shaped 

 carpus appears 2,5-times as long as the second, that is one-fourth longer than the fifth, the 

 fourth segment is the shortest of all and the chela, the fingers of which are but little longer 

 than the palm, appears a trifle shorter than the three last segments combined. 



Ischium of 3 rd and 4 th legs with a strong, movable spine. Merus of 3 rd legs in the male 

 5,31-times, in the female 5,26-times as long as broad, glabrous and unarmed; carpus a little 

 more than half as long as the merus, in the male 4,3-times, in the female 4,34-times as long 

 as thick, unarmed, with a few setae on the anterior margin; propodus both in the male 

 and in the female 1,26-times as long as the carpus, almost 6-times as long as broad (in the 

 male 5,92-times, in the female 5,8-times), with 11 or 12 spines on the posterior margin, anterior 

 margin setose ; dactylus measuring a little more than one-fourth of the length of the propodus, 

 armed at one-fourth of its length from the tip with a small, acute, acces sory tooth 

 on the posterior margin. Fourth legs similar to the third. 



Eggs small, numerous, globular, 0,5 mm. thick. 



Remarks. In his last paper "Ricerche sui Crostacei della Polinesia, Torino, 1907" 



292 



