320 



<5 3 Larger chela without a transverse groove near the articulation of the 

 dactylus. Rostrum as in A. gracilipcs, triangular, flattened above,' 

 arising from between the bases of the eye-hoods, with the margins 

 overhanging the rostro-orbital furrows. 

 c l First carpal article of 2 nd legs hardly half the 2 nd in length . . pugnax Dana 

 (J. D. Dana, U. S. Explor. Exp. Crustacea, p. 554, PI. 35, fig. 6). 



c z First carpal article of 2 nd legs 1,2-times as long as 2 nd . Rostrum 

 1,5-times as long as wide at its base, with a tracé of a gastric 



spine in the mid-line , dasycheles Cout. 



(H. COUTIÈRE, in: Buil. Soc. Philom. Paris, 1908, p. 21). 



a„ Merus of 3 rd legs with no tooth at distal extremity of posterior margin. 



ó l Larger chela with a transverse or oblique groove on the upper border 



near the articulation of the dactylus. 



c Y Rostral carina more or less obtuse, not arising from a triangular, 



flattened base between the eye-hoods. 



d { Second carpal article 1,12-times as long as i st . Merus of 3 rd legs 



a little more than 4-times as long as wide, bearing 3 movable 



spinules on the middle of posterior margin. Larger chela with 



a transverse furrow . * Lanceloti Cout. 



(H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 900, PI. LXXXIII, lïg. 39). 



d„ First carpal article 2 — 2,44-times longer than 2 nd . Merus of 3 rd 

 legs quite unarmed. Upper border of the larger <diela with a 

 narrow groove anteriorly, running obliquely inward, though 



not continued on the inner surface of the palm Ehlersi de Man 



(J. G. DE Man, in : Proc. Zool. Soc. London 1909, p. 663, PI. LXX). 



c„ Rostrum arising from a triangular, flattened base between the eye- 

 hoods, separated from the latter by deep grooves. 

 d 1 Frontal margin with an almost vertical prominence just before 



and at the inner side of the obtuse tips of the eye-hoods. . gracilipcs Stimps. 

 d, 2 Frontal margin straight. Larger chela thicker than that of A. 



gracilipcs novac-zclandiae Miers 



(E. J. MlERS, Catalogue of the Stalk- and Sessile-eyed Crustacea of New Zealand, 

 London 1876, p. 82, PI. II, fig. 2). 



ó„ No transverse or oblique groove on the upper border of the larger chela. 



c l Orbital hoods terminating in flattened spines ("épines plates") reaching 



to the middle of 2 nd antennular article. Larger and smaller chela 



quite as in A. paracrinitus Miers var. bengalensis Cout., i st carpal 



article of 2 nd legs 1,7-times as long as 2 nd . Third legs more 



slender than those of A. paracrinitus Coetivensis Cout. 



(H. CüUTIÈre, in: Buil. Soc. Philom. Paris, 1908, p. 20). 



188 



