Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 131 



of the third article, which is nearly one and one-half times as long 

 as the second article and rather bulbous; both the second and third 

 articles are very setiferous on the upper and lateral margins; the 

 biramose flagella have the proximal parts thickened for a distance 

 equal to the length of the last two peduncular articles ; the remainder 

 are thin, whip-like. 



The antennae have a scaphocerite which is two-thirds as long as the 

 entire carapace, and has the outer lateral margin approximately 

 straight, terminating in a spinule which scarcely at all extends beyond 

 the rounded tip of the blade ; the inner lateral margin is not straight 

 but curves gently, sloping toward the rounded apical portion, both 

 of which are crenulate and setose. The greatest width of the scaphoc- 

 erite occurs at the proximal end and is equal to one-third the length 

 of the scale ; the rounded tip of the scale measured across opposite the 

 base of the distal spine is only one-fifth as wide as the basal width. 



The external maxillipeds bear a podobranch. The epipodite is slen- 

 der, about one and one-half times as long as the basipodite is wide. 

 The ischium is three times as long as its greatest width ; it is narrowed 

 proximally; the merus is subpyriform, the length being about three- 

 fifths of that of the ischium ; the lateral margins are convex and con- 

 vergent distally; the carpus is four-fifths as long as the merus, nar- 

 rowed proximally and dilated distally, claviform, its distal or 

 maximum thickness being equal to one-third of its own length; the 

 propodus is approximately as long as the carpus, cylindrical, one-fifth 

 as thick as long; the dactyl, including the apical spine, is five-sixths 

 as long as the propodus, the spine comprising two-fifths of this length. 

 The inner lateral margins of the endognath are furnished with many 

 setae. 



The first three pairs of legs are chelate; the last two pairs attenu- 

 ated, monodactylic. 



The thelycum of the adult female corresponds with that figured by 

 Dr. de Man from the type taken by the "Sihoga" in the Indo-Paeific 

 Ocean. 



The thelycum consists of a trapezoidal process, between the third 

 pair of legs ; this process is broadest on the basal margin ; the lateral 

 margins converge anteriorly, the anterolateral angles are acute; the 

 anterior margin is V-like, deeply emarginate in the middle ; between 

 the fourth pair of legs there are two plates, the anterior of which is 

 produced forward A-like in the middle and correspondingly emar- 

 ginate on the posterior margin ; the anterior plate is not so wide as 



