315 



c„ Scale of scaphocerite not yet reaching to the middle of 2°<i an- 



tennular article. 



Basicerite unarmed. Fingers of smaller chela shorter than the palm. 



Second legs slender, 2'"' carpal article 2,5 — 3-times as long as 



the i^'. Internal posterior margin of merus of 3"Megs armed with 



20 — 30 spinules paraculeipes Cout. 



b^^ Dactyli of three posterior legs simple. 



c^ First carpal article of 2"'' legs shorter than 2°^. 



d^ Fingers of the small chela in the male shorter than the palm ; 

 rarely [A. consobriniis de Man) longer than the palm, in this 

 case the dactylus much broadened. 

 e^ Orbits acute in front, with their apices curved inward. 



Basicerite unarmed. Fingers of smaller chela short, dactylus not 



enlarged. Second carpal article of 2"<^ legs twice as long as i^' brevipes Stimps. 

 (W. Stimpson, in: Proc. Acad. Nat. Scienc. Philadelphia, i860, p. 30). 



e„ Orbits rounded anteriorly, at least not acute. 



f^ Second carpal article of 2°'^ legs hardly longer than i^'. 

 Rostral carina short. Fingers of smaller chela a little shorter 

 than the palm. Merus of 3"! legs 4-times as long as wide 

 in the middle. Terminal spine of scaphocerite a little shorter 

 than the carpocerite and than the antennular peduncle . crinittis Dana 

 (J. D. Dana, U. S. Explor. Exp. Crust, p. 548, PI. 34, fig. 8). 



f^ Second carpal article of 2"'^ legs at least one and a half 

 as long as i^'; when less than one and a half, the 

 merus of 3''^ legs 2, 7 5 -times as long as wide (female of 

 A. bradypus Cout.) or the rostral carina continued beyond 

 the middle {^parvus de Man). 

 g^ Rostral carina continued backward to beyond the middle 

 of the carapace. 

 Scale of scaphocerite as long as antennular peduncle, 

 //j Carpus of 3''^ legs armed with 3 or 4 spinules on its 

 anterior margin, with 2 or 3 on its posterior. Terminal 

 spine of scaphocerite as long as or slightly longer 

 than the carpocerite. Second carpal article 1,6-times 



as long as the i^' bucephaloides Nob. 



(G. NOBILI, in: Bull. Scientif. France et Belgique, XL, 1906, p. 29). 



//j Carpus of 3''^ legs bearing three spinules on its posterior 

 margin, but no ones on the anterior. Fingers of 

 smaller chela, in the female, much shorter than the 



palm. Second carpal article twice as long as the i^'. longecarijiat2isW\\gi^. 

 (F. HiLGENDORF, in: Monatsber. Akad. Wiss. Berlin, 1878, p. 833, Taf. IV, fig. 3 — 7). 



