Boone, Crustacea, Cruises of ''Eagle" and "Ara," 1921-28 193 



lateral angle, a slight curved row of denticles on the proximal half 

 of the dorsal surface ; the propodus, including tlie dactyl, is fully one 

 and one-half times as long as the merus; laterally compressed but 

 moderately robust ; armed on the superior and inferior lateral margins 

 with carina-like rows of denticles, also with one such carina in the 

 median line of the inner lateral face of the propodus and an isolated 

 denticle above this carina ; three similar denticled carinae occur on the 

 outer face of the propodus. The inferior dactyl comprises half the 

 propodal length; is strong, rather flattened, tapering to a sharp, up- 

 curved point; the cutting edge of the inferior dactyl is armed with 

 five major groups of teeth, each group consisting of a large triangular 

 tooth, on either side of which is a small triangulate tooth. The hinged 

 finger is similar to the inferior finger, but is slightly slenderer and 

 more curved. It also has five major groups of teeth which interfit 

 with those of the lower finger. 



The first, second and third pairs of ambulatories are similar, but the 

 tip of the third pair only reaches to midway the distal joint of the 

 second pair. Each of these legs has the merus elongate, subcylindri- 

 cal; the carpus, short, compressed; the propodus, broadly flattened, 

 blade-like, with the lateral margins fringed with setae; the dactyl, 

 also flattened and fringed, a little longer than the propodus and taper- 

 ing to a very acuminate apex. The last pair of legs are modified as 

 natatory organs, as in the Portunidae; the basis, ischium, merus and 

 carpus are stocky, short ; the merus has a single spine placed subdis- 

 tally on the postlateral margin ; the propodus is as long as the merus 

 and carpus taken together but is flattened blade-like with the posterior 

 distal region especially produced ; the dactyl is broadly oval, flattened, 

 as long, or a trifle, longer, than the propodus. The lateral margins of 

 tha distal four joints of this pair of legs is fringed with short, fine 

 setae. 



The antennules have the proximal joints slender, well-developed; 

 the flagellum two-branched, rudimentary ; all fold transversely in the 

 septum. 



The antennae have the peduncular joints situated in the orbital 

 sinus, and a long, slender flagellum which is a little longer than the 

 antennulae. 



The peculiarly developed eyestalk is stout, cylindrical, with a joint 

 at the base of the spherical cornea; a rounded, tongue-like process of 

 the stalk projects on the median dorsal surface of the cornea; the 



