24, AUSTRALASIAN ANTARCTIC EXPEDITION. 
Family SvepH1p2. 
Genus StepHos Scott, 1892. 
STEPHOS LONGIPES Gesbrecht. 
(Plate II, figs. 1-7.) 
Stephos longipes Giesbrecht, 1902, p. 20, plate II, figs. 6-14. 
Two specimens of S. longipes occurred in the gathering from Station 8. Judging 
from Dr. Giesbrecht’s illustrations one of these would seem to belong to an immature 
male, the other possibly to an adult female (fig. 1). There is a short and stout bifid 
rostrum, the posterior maxillipeds are very much elongated and slender, the swimming 
feet agree accurately with those limbs as figured by Dr. Giesbrecht. 
STEPHOS SIMILLIMUS sp. nov. 
(Plate IX, figs. 12-18.) 
Female.—Length 12 mm. This species, of which several examples occurred 
in the tow-net gathering from Station 6, agrees in most respects with the description 
and figures of S. lamellatus given by Professor G. O. Sars in vol. 5 of his work on the 
Crustacea of Norway, the most important distinctive characters belonging to the third, 
fourth and fifth pairs of feet. The basal joint of the fourth pair has three spine-like 
hairs on its inner margin and one or two similar hairs arising from a not very clearly 
defined laminar expansion on its front surface; the terminal joint of the third 
exopodite has on its anterior surface three crescentic groups of very minute spines; 
the filth pair is simple, each branch consisting of three linear joints without spinules or 
marginal cilia. Posterior maxillepeds long and slender, the internodes scarcely at all 
constricted. Of the male I have seen no examples. 
HETERARTHRANDRIA. 
Family CenTROPAGIDA. 
Genus BOECKELLA de Guerne and Richard. 
BoECKELLA BREVICAUDATA Brady. 
(Plate V, figs. 10-18). 
Centropages brevicaudatus Brady, Ann. and Mag. Nat. Hist., ser. 4, Sep- 
tember, 1875; vol. XVI, p. 162, and Phil. Trans, vol. 168, p. 215, plate 
XII, figs. 11-19. 
Boeckella vexillifera Ekman, 1905, p- 16, plate I, figs. 7-12 
“ 
Female.—Length 1:75 mm. Seen dorsally the metasome is of nearly equal 
width throughout, the width equal to about one-third of the entire length, the hinder 
part expanded so as to form two large acutely pointed lateral wings, the head very wide 
