Qs AUSTRALASIAN ANTARCTIC EXPEDITION. 
Family AUGAPTILIDA. 
Genus HaLoprinus Giesbrecht, 1898. 
HAoptinus oceLiatus Wolfenden. 
(Plate VI, figs. 9, 10.) 
Haloptilus ocellatus Wolfenden, 1908, p. 42, Plate 3, figs. 1, 2. 
2 
The long and very sharp median frontal spine and the very conspicuous ocellar 
patches sufficiently distinguish this species from any other. Several specimens occurred 
in the gatherings of the Mawson Expedition, at Stations 4 and 8, and three from 
Station 7. 
The very remarkable transparency of the animals belonging to this genus, 
together with the elongated aculeate or hooked rostrum sufficiently distinguish it from 
all others. 
Family ACARTIIDA. 
Genus AcAntiaA Dana, 1846. 
ACARTIA ENSIFERA Brady. 
(Plate XIV, figs. 1-6.) 
Acartia ensifera Brady, 1889, p. 33, Plate IX, figs. 8-15. 
Two imperfect specimens—male and female—were found in the tow-net gathering 
from Station 17. Some of the limbs were apparently distorted, and though they do 
not altogether agree with those of the New Zealand specimens here referred to, one 
would scarcely be justified in assigning to them a new specific name. 
AMPHARTHRANDRIA. 
Family Orrnontp a. 
Genus O1rTHONA Baird, 1843. 
OITHONA FRIGIDA Giesbrecht. 
(Plate X, figs. 18-20.) 
Otthona frigida Giesbrecht 1902, p. 29, Plate VI, figs. 10-16. 
Female.—Length 1-3 mm. Seen dorsally, the anterior portion of the body is 
compressed, ovate, with a short, acute rostrum; abdomen very long and slender, nearly 
as long as the cephalothorax; anterior antenni reaching as far as the middle of the 
abdomen. The appendages of the mouth and the swimming feet agree, so far as I 
have been able to make them out, with Giesbrecht’s descriptions. 
The Stations at which it occurred are 2, 5 and 6. 
