COPEPODA—BRADY. a7 
Two specimens only of this species were seen; both of them taken in the tow-net 
at a depth of two fathoms off Macquarie Island. 
Family HetsRORHABDID&. 
Genus HeTERORHABDUS Giesbrecht, 1898. 
HETERORHABDUS AUSTRINUS Giesbrecht. 
(Plate IV, figs. 1-9.) 
Heterorhabdus austrinus Giesbrecht, 1902, p. 28, Plate 6, figs. 1-9. 
This species is closely allied to H. Clausi Giesbrecht, the chief difference being the 
absence of a hook-like spine on the first joint of the fifth exopodite of the female; the 
fifth foot of the male is more robust and massive than that of H. Clausi—especially as 
to the terminal claws, but is otherwise similar. H. norvegica Boeck, as figured by G. O, 
Sars, differs only very slightly from the other two. 
H. austrinus was taken sparingly in 100 fathoms—Stations 9, 11, 12, and one 
specimen only at Station 1. 
HETERORHABDUS FARRANI sp. nov. 
(Plate IV, figs. 10-18.) 
H. Farrani may be distinguished from the foregoing species by the serrated 
posterior margins of the abdominal segments, by the distichously spinous character 
of the two median tail sete, and by the absence of the usual long falciform spine of 
the basal joint of the posterior maxilliped. The fifth pair of feet in the male is 
comparatively short and stout and its apical joints do not bear the long curved spines 
generally characteristic of the genus. The fifth pair in the female is much stouter than 
in H. austrinus, and the terminal spine of the exopodite is larger. H. Farrani was 
found only in 100 fathoms at Stations 9 and 11. Not more than two or three 
specimens were seen. 
HETERORHABDUS NIGROTINCTUS sp. Nov. 
(Plate VI, figs. 1-8.) 
I refer this doubtfully to the genus Heterorhabdus, with which it appears to agree 
in all respects except in the absence of the peculiar excurrent tooth of the mandibles 
which is generally so conspicuous in that genus. The anterior antenna of the right 
side of the only specimen seen was imperfect, and may perhaps have a geniculating 
joint. The maxilla has the well-marked distinctive characters of the genus; so also has 
the fifth pair of feet. Length, 5 mm. 
The long sete with which the mouth-organ and limbs are clothed are mostly 
plumose and deeply tinged with black pigment. One specimen only was seen in the 
gathering from Station 9; depth, 100 fathoms. 
