COPEPODA.—BRADY. 93 
fifteenth, and fifteenth and sixteenth joints, but no perceptible geniculated hingement. 
Anterior maxilliped short and stout, with five setiferous digits on the anterior margin; 
posterior maxilliped five-jointed, the terminal lash composed of only three joints ; 
endopodite of the second pair of feet having a deeply excavated fossa on the inner 
margin, which is protected by a spine both above and below; terminal spines of the 
exopodites linear, long and slender, very finely pectinated on the outer edge. Fifth 
pair of feet consisting of a simple wedge-shaped uni-articulate (or very indistinctly 
divided) branch on each side, very broad at the base, much narrowed distally, and 
bearing at the apex two short spines. Abdomen of two segments, the second twice 
as long as the first and rather tumid; fureal plates twice as long as broad. Male 
unknown. 
Two specimens have been detected, from Stations 11 and 12 respectively, depth 
100 fathoms; also one from Station 1, off Macquarie Island, 2 fathoms, and others 
from Station 5. 
Family SCOLECITHRICIDA. 
Genus SCOLECITHRIX Brady, 1883. 
Scorecrrurix Romert Mrdzek 
(Plate II, figs. 8-13). 
Scolecithrix Rémeri Mrazek, 1902, p. 518, plate VI and text, figs. 10-12. 
> glacialis Giesbrecht, 1902, p. 25, plate IV, figs. 1-7. 
The specimens here figured are undoubtedly identical with the species named by 
Mrazek Scolecithrix Rémert. It seems doubtful, however, whether the species can be 
rightly referred to that genus. The group of vermiform hairs on the posterior 
maxillipeds, which are faintly indicated in Mrazek’s figures, are barely perceptible in 
the Antarctic specimens, and are scarcely recognisable as the structures from which 
the generic name of the “Challenger” specimens was derived. But the generic 
reference may stand, at any rate provisionally. The female only is described and figured 
by Dr. Giesbrecht, and is evidently identical with Mrazek’s species. The date of 
publication is the same in both cases—1902. ‘The Mawson expedition specimens are 
from Stations 1, 6, 8, 11 and 13. 
Genus RacovirzANnus Giesbrecht, 1902. 
RACOVITZANUS ANTARCTICUS Giesbrecht. 
Racovitzanus antarcticus Giesbrecht, 1902, p. 26, plate IV, figs. 8-13; plate V, 
figs. 1-5. 
(Plate III, figs. 13-18.) 
Two or three specimens found at a depth of 100 fathoms. Stations 9 and 11. 
