115 

 f51- Sicyonia fallax de Man. 



J. G. UE Man, in: Notes from the Leyden Museum, Vol. XXIX, 1907, p. 141. 

 Stat. 105. July 4. 6°8'N., 121° 19' E. Suiu Sea. 275 m. Coralbottom. i female. 



It is vvith some doubt that this specimen is described as a new species, because it 

 is apparently closely related to Sic. longicauda Rathb. from the Hawaiian Islands (vide: U.S. 

 Fish. Commission Buil. for 1903, Part III, Wash. 1906, p. 908, PI. XX, Fig. 6). 



This specimen is 45 mm. long, the carapace, without the rostrum, measures 9,3 mm., 

 the rostrum alone 4,2 mm., the abdomen 31,5 mm. 



The body is covered with a close and short tomentum, that, however, is rubbed off 

 from the greatest part of the abdomen; a few longish, fine setae are implanted on the carapace 

 near the rostral crest and near the dorsal crest of the abdomen, a few also on the sides of 

 the carapace and on the abdominal pleura. The rostrum is shorter and less slender than in 

 Sic. longicauda and reaches, beyond the eyes, barely to the far end of the i^' joint of the 

 antennular peduncle; it appears still more strongly ascending and broader at its base than in 

 that species. Upper margin with 4 teeth, the 1^' or posterior just behind the frontal margin 

 of the carapace, its tip a little farther distant from that of the 2°^^ as the latter from the tip 

 of the 3'"'!; the 3"^ tooth is a little farther distant from the 4^^^ as from the 2^^ and the 4"^ 

 is about one and a half as far from the 3"^ as from the tip that is acute. A small tooth 

 exists, just below the tip, at the far end of the slightly convex, lower margin, so that the 

 tip appears tridentate; lower margin fringed with long hairs. Ridge on the lateral side oi 

 the rostrum situated close to the lower margin. Of the two teeth on the dorsal crest of the 

 carapace the posterior is larger than the anterior and more prominent than in 

 Sic. longicauda: the dorsal crest extends almost to the posterior margin, ending at a distance 

 of 0,4 mm. from it. 



Outer angle of the orbits obtuse, antero-inferior angle of the carapace rectangular, obtuse; 

 hepatic spine long and slender. 



The abdomen much resembles that of Sic. lojigicauda, but the 6"^ somite is hardly 

 one and a half as long as the 5'i^, the ó''' somite being 5,5 mm. long, the 5"^ 4 mm.; 

 the 6"^ somite, 3,4 mm. broad, appears somewhat more than one and a half as long as broad. 

 The abdominal somites are nearly smooth ; one observes a faint transverse furrow on the 

 pleura, that are incompletely separated from the terga by a ridge, but this ridge is almost 

 indistinct on the 3''! and 4* somites. The telson is 7 mm. long, clearly longer than the 6"^ 

 somite; it is deeply furrowed and carries a pair of small spinules just near the acute tip. The 

 outer uropod is just as long as the telson, the inner a trifle longer. 



The eyes are of moderate size and just reach beyond the middle of i'^' antennular article, 

 cornea grayish, near its posterior margin more blackish. Outer margin of i^' antennular article 

 with two slender spines ; 2"<i article little shorter than the i^', i'^^ much smaller and narrower, 

 measuring one-fourth the 2"<^; lower (inner) flagellum as long as the 2"'' article, upper flagellum 

 thicker, nearly just as long. 



Basal joint of outer antennae with a strong spine at the outer angle, peduncle reaching 



115 



