252 Southern C 'ross. 



I')0(ly oval, about two smd a half times as long as broad, with 

 very large urojioda, covered with small dark coloured spots, which, 

 however, leave small light coloured vacant spares here and there. 



Ce]»hal()n, the normal size for the genus. It bears a large 

 prominent median rostrum, the base of which curves outwards to 

 form a stouter if less prominent tooth at the antero-lateral angle. 

 The eyes are large and borne on lateral processes of the cephalon, 

 which is somewhat constricted posteriorly. 



Thorax. The segments are all sliort, tlie fourth is the broadest 

 and straight, the three anterior ones having a more or less con- 

 spicuous forward curve. The lateral margin of these four segments 

 is toothed anteriorly and posteriorly, the intermediate portion being 

 l>i-lobed. The three posterior segments are curved backwards, 

 particulnrly the last one, their lateral margins are rounded but still 

 bi-lobed. 



Pleon, lateral margin rounded, posterior truncated, but with a 

 stout rounded projection in the middle line. 



First antenna. Peduncle three-jointed ; the first is very stout, 

 the other two are more slender, the third being more so. They 

 are sub-equal in length, the liagellum is multiarticulate and reaches 

 about two-thirds the length of the penultimate joint of the peduncle 

 of the second antenna. 



Second antenna. Peduncle six -jointed ; the first four are short 

 and stout, the third, which is the largest of the four, carries externally 

 a small digitiform scale setose at the distal extremity. 



Of the two large terminal joints, the more distal one is slightly 

 the longest, both are sparingly setose, as long again as the proximal 

 four joints. They are followed Ijy a long multiarticulate fiagellum. 



Mandible. Cutting edge, with a prominent bi-lobed tooth and 

 below a fringe of stout setae. A deep incision between this and the 

 molar expansion. Palp long and slender, second joint twice as long 

 as the first terminal joint, curved and with setae on the inner 

 margin and at the extremity. 



First maxilla. Terminal spines of the outer lobe toothed, a series 

 of weaker spines some little distance from the extremity. 



Second maxilla. Inner lobe slightly enlarged at its extremity 

 and rounded, the terminal portion densely clothed with rather long 

 setae. The outer lobe and palp are both slender and curved 

 backwards, the former terminates in ihree, and the latter in two, 

 long setae. 



Maxillipede. Inner margin of masticatory lobe quite straight, 

 distal and outer margins slightly rounded, the former bearing a 



