172 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



extend almost to the flagellum of the second pair of antennae; the 

 first two joints of the peduncle very broad; second joint extends ante- 

 riorly over the third joint, reaching almost to the extremity of that 

 joint; third joint two-thirds narrower than first and 

 second; the flagellum is composed of nine articles. 

 Second pair of antennae extend to the middle of the 

 first thoracic segment; flagellum is composed of ten 

 articles. 



Epimera of all the thoracic segments narrow, the 

 first two being rounded, the other four more acute 

 at their extremities. First two pairs of prehensile 

 legs rather stout; third pair less so, and the pro- 

 podus of this pair is furnished with a large cultri- 



form process. Five spines 

 are present on the merus 

 of all three pairs. Gres- 

 sorial legs slender and 

 sparsely spinulose. 



All the abdominal seg- 

 ments are visible in a dor- 

 sal view. Terminal seg- 

 ment broad and posteriorly 



FIG. 151. JEGA. ECAR- 

 INATA. X2f. 



FIG. 152. MGA 

 ECARINATA. 

 MAXILLIPED. 

 x39. 



bisinuated, forming three 

 teeth with rounded extremi- 

 ties; its surface is entirely 

 smooth. 



Outer branch of uropods 

 narrower and somewhat 

 shorter than the inner branch ; 

 its extremity is rounded. 



Inner branch obliquely truncate and crenulate on 

 posterior margin. Uropods and terminal abdominal 

 segment all fringed with a few hairs. 



Two individuals of this species were found one 

 between the delta of the Mississippi and Cedar Keys, 

 Florida, Station 2403, depth 88 fathoms; the other, 

 the type (Cat. No. 21001, U.S.N.M.), off Little Ba- 

 hama Bank, Station 2655, depth 338 fathoms. 



This species is closely related to A. tridens a Leach, 

 but presents many specific differences; in the relative length and 

 breadth of the body, the length being more than three times greater 



For synonymy, see Naturhistorisk Tidsskrift, XII, 1879-80, Schioedte and 

 Meinert, Symbols ad Monographium Cymothoarum, Crustaceorum Isopodum 

 Familiae, pp. 340-341. 



FIG. 153. JEGA. ECAR- 

 INATA. X &?. a, 

 LEG OF FIRST PAIR. 

 6, LEG OF THIRD 



PAIR, c, LEG OF 



SEVENTH PAIR. 



