28o Southern Cross. 



specimens from Cape Adare measure up to 60 mm. in length, of 

 which about two-thirds go to the attenuated abdominal region and 

 one-third to the tumid thoracic region. 



The tori uncinigeri commence on the second setigerous segment. 

 The uncini are uniserial at first, but at the seventh uncinigerous 

 segment their vertices become turned alternately in opposite 

 ilirections, a condition which is thus described by Kinberg : — 

 " Uncini breves, series simplices fingentes, in segmentis posterioribus 

 regionis anterioris antrorsum et retrorsum vergentes alternantes." 

 This alternation of the uncini occurs in ten uncinigerous segments, 

 from the seventh to the sixteenth (the last thoracic segment) 

 inclusive. 



The uncini are fringed at their vertices by two rows of uncinules, 

 those of the front or major series being not less than five in number 

 in a transverse row, when seen in frontal view ; the distal end of 

 the basal portion of the miciniis is obtusely rounded, and there is a 

 low protuberance in the concave border of the basal portion. 



The second gill is smaller than the first, and commences to 

 branch from the base ; the first gill has a stout stipe, the branches, 

 which spread out in a more or less palmate manner, occupying the 

 upper three-fifths of it. 



In the intersegmental grooves behind the tliird and fourth 

 capillary fascicles there is a low whitish ovate body which possibly 

 has relation to the reproductive system. In one of the larger 

 specimens, these bodies have the form of short, stout, subulate, 

 cirriform papillae, which occur near the posterior dorsal border of the 

 respective capillary fascicles in the intersegmental grooves. 



SUB-FAMILV POLYCIRRIDEA. Malmgren. 



Ereutho. 



Malmgren, A. J., 1865, 'Xoidiska Hafs-Annulater,' Of v. Ak. Forh., p. 391. 



Pars antica corporis solummodo fasciculis setarum capillarhim praedita ; pars 

 postica toris unciuigeris munita; piunulae unciiiigerae a segmento XI V'"", 

 I.e. primo jione segmentuni iiltinmiii setigeruin incipientes ; caput cirris 

 teutacularihus loiigis numerosis obsitum : branchiae nuUae. 



o' 



The above diagnosis is Malmgren's, slightlv altered so as to 

 include a species based upon a single specimen, whose autonomy must 

 remain a matter of donlit until nK>re examples are obtained. 



