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A new species of the Edwardsii group, closely approaching to A. pareuchirus Cout. 

 and to A. leptocliirits Cout. This specimen, 12,5 mm. long, is probably still young. Rostrum 

 acute, narrow, one and a half as long as broad at its base and reaching to the distal fifth of 

 the visible part of first antennular article; the rostral carina which between the eyes is narrow, 

 strongly compressed, though obtuse, is traceable almost to the middle of the carapace, but, 

 posterior to the orbital hoods, it gradually widens and becomes more and more indistinct. 

 Frontal margin at either side of the rostrum straight, whereas it appears here decidedly concave 

 in A. leptochirus-, grooves between the rostrum and the rounded, orbital hoods moderately 

 broad and deep. Telson 4-times as long as its posterior margin is broad, the latter half as 

 broad as the greatest width; upper surface not grooved. 



Second joint of antennular peduncle very slightly shorter than the visible part ot 

 the first, third article measuring two-thirds of the second; in A. leptochirus the second article 

 appears distinctly longer than the visible part of the first (Coutière, Alpheidae Mald. and Laccad. 

 Archip. 1905, fig, 54). Stylocerite larger, i. e. broader, than in the other species and ending 

 in a spine that reaches to the 2 nd fourth part of second antennular article. Basicerite with a 

 small spine, long 0,14 mm., on the lower side; carpocerite just as long as the antennular 

 peduncle, the scaphocerite the outer margin of which is concave, projects beyond the antennular 

 peduncle almost as far as the 3 ld joint of the latter is long; the blade reaches just beyond the 

 tip of the antennular peduncle and the terminal spine which is slightly curved inward, extends 

 by two fifths of its length beyond the tip of the blade. 



Merus of the large cheliped nearly 4-times as long as broad in the middle, apparently of 

 a more slender form than in A. leptochirus-, infero-internal margin with acute tooth at the apex. 

 The large chela, one-fourth longer than the carapace, much resembles that of A. leptochirus, 

 the chela being 3-times as long as broad (high) and the fingers measuring little more than 

 one-fourth of the total length : the proportion, indeed, between the latter and the length of the 

 fingers is 3,5, like in A. hptochirus. The narrow notch near the articulation of the dactylus 

 passes into the long, narrow, quadrangular depression on the outer face, that extends to beyond 

 the middle of the palm, the depression on the inner surface is triangular, but rather shallow; 

 differently from A. leptochirus but nearly as in A. pareuchirus Cout., the lower border is not 

 notched, but only slightly sinuous. The fingers are less high than the palm, just as 

 in A. leptochirus. 



Merus of the small cheliped 5-times as long as broad in the middle, its infero-internal 

 margin armed with two small spinules and, at the apex, with an acute tooth. Chela measuring 

 two-thirds the length of the large chela, slender, 5, 5-times as long as high; fingers just as 

 long as the palm, dactylus Balaeuiceps-shaped, somewhat less broad than that of A. leptochirus 

 (Coutière, 1. c, fig. 54 b), when looked at from above. 



Carpal segments of the second legs 1,2 mm., 1 mm., 0,42 mm., 0,5 mm. and 0,7 mm. 

 long, chela 1,14 mm. long (palm 0,54 mm., fingers 0,6 mm.); the second segment is slightly 

 shorter than the first and the first appears just as long as the two last segments taken together 

 and about as long as the chela; fingers little longer than the palm. 



The following legs resemble those of A. leptochirus. So e. g. the meri of the third legs, 



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