76 



of the lateral margin and one somewhat nearer to the middle line than to the former : all are 

 slightly directed outward. The basal joint of the caudal swimmerets ends in a flattened spinule, 

 like also the outer border of the proximal, not membranaceous part of the lateral swimmerets. 



The inner antennae reach by their flagella beyond the distal lobe of the outer; the 

 terminal joint of their peduncle is little more than half as long as the penultimate. 



The basal joint of the outer antennae i. e. the 2""^ and y-^ joint coalesced, presents an 

 acute tooth on the anterior border of its upper surface, somewhat nearer to the dentiform, inner 

 angle than to the outer, and also a sharp tooth on its outer margin, outside of the inner orbital 

 angle; this last-named tooth extends backward and outward over the eye-peduncle. The 4"^ 

 joint, i.e. the proximal (outer) antennal squame, which is somewhat longer than broad, is 

 traversed b}' a rather prominent midrib, that runs just in the middle of this joint. The outer 

 margin is cut into two large acute teeth; the distance between the tips of these two teeth 

 is somewhat shorter than the distance between the tip of the anterior tooth and the extremity of 

 the squame. The inner margin is armed with one single acute tooth, but it should be 

 remarked that the proximal end of this margin carries also an acute, much smaller tooth, which 

 is directed straight forward; this tooth has not been described by Berthold, but it is distinctly 

 visible in his figure, on the left antenna, just near the antennular peduncle. This tooth, however, 

 that exists also in other species, as e. g. in Scyl/. sordidus (Stimps.), is not counted as a tooth 

 of the inner margin. The anterior margin of the upper surface of the 5'^^ joint bears a small 

 flattened tooth at the outer and another acute one at the inner angle. Of the distal squame 

 or flagellum, that reaches slightly beyond the proximal one, the anterior margin is deeply cut 

 into five cusps; the i^', on the outer angle, is obtusely pointed, the following are sharp, 

 especially the 5"'; the three outer cusps are nearly of equal width, the two following become 

 gradually narrower. The inner margin carries moreover a quite small, acute tooth, at the base 

 of the 5''^ cusp. 



Sternum broad, one and a half as long as broad posteriorly. Its anterior extremity is 

 truncate (PI. II, Fig. 10) and one-fourth as broad as its posterior border; this truncate, 

 anterior border, that presents a minute notch in the middle line, is one of the three sides of 

 a triangular, equilateral groove at the anterior end of the sternum, that reaches but little 

 farther backward than the anterior border of the basipodites of the 2"^' legs. The sternum, 

 though coarsely pitted, is smooth and not tuberculate in the middle line. 



The thoracic legs of the i^' pair resemble closely those of ScvlL sordidiis (Stimps.), but 

 the}' are much more furrowed. The anterior legs of Scy/I. sordidiis bear only one single 

 furrow, namely on the outer surface of ischium and merus, just near and parallel with 

 their lower edge. The outer surface of the merus-joint of Scyl/. Haaiiii is marked, besides 

 with the just described furrow, still with another, that runs close to and parallel with its upper 

 border; the upper border of the carpus is rather sharp and slightly furrowed on the inner side, 

 the outer surface carries one or two grooves. Tlie upper border of the propodus is fringed 

 with short hairs internally and a deep furrow runs on its outer surface near the upper border 

 and parallel with it. The legs of the 2"'^ and of the 3''^^ pair are especially characteristic of 

 this species. The outer side of the slender merus of the 2"<^ legs (PI. II, fig. 10^) is traversed. 



