496 PROFESSOR CHARLES CHILTON ON THE 
Mr Sreppinc has put Atylus lippus Haswell down as a doubtful species of 
Eusiroides, but I have specimens from Sydney Harbour that I think certainly belong 
to HaswELv’s species, and these I cannot distinguish from the species common on New 
Zealand coasts which was described as Atylus danat by Mr Tuomson. The species is 
therefore now known from Australia, New Zealand, and the Falkland Islands, and 
probably extends round the globe in sub-Antarctic seas. 
Pontogenera antarctica Chevreux. 
Pontogeneia antarctica Chevreux, 1906a, p. 72, fig. 2, and 1906p, p. 69, figs. 40 and 41. 
Chilton, 19094, p. 624. 
” oP) 
South Orkneys, Scotia Bay, Station 325; in shore pools and at moderate depths. 
Several specimens, the largest 6 mm. long. 
These specimens agree well with CHEVREUxX’s description, and can be distinguished 
from the preceding most easily by the character of the upper aritenne, as described 
above. 
Though this species seems to be a true Pontogenera, yet in the somewhat slender 
antennz it makes some approach towards the genus Paramera, and at the end of the 
third joint of the upper antenna there is a short process tipped with one or two long hairs 
that appears to represent a vestigial accessory flagellum, but it is fused with the third 
joint of the peduncle somewhat as appears to be the case in Atylus inegalophthalmus 
Haswell, which is looked upon as a variety of Paramera austrina (Bate). Ponto- 
genera antarctica is, however, clearly distinguished from Paramera by having every 
third joint of the primary flagellum expanded below, instead of every second, and 
also by the lobes of the telson being rounded posteriorly. 
The species is known from Auckland and Campbell Islands, from Flanders Bay and 
Booth Wandel Islands, as well as from the South Orkneys, and thus appears to represent 
P. dana in colder and more southerly seas. 
Genus ATYLOIDES Stebbing, 1888. 
Atyloides magellanica (Stebbing). (Plate I. fig. 18.) 
Atylopsis magellanica Stebbing, 1888, p. 925, pl. lxxix. 
Pontogeneia magellanica Stebbing, 1906, p. 360. 
. Ah Walker, 1907, p. 33, pl. xii. fig. 20. 
* wi Chevreux, 1906z, p. 64, figs. 37-39. 
Atyloides magellanica Chilton, 1909a, p. 627. 
‘South Orkneys, Scotia Bay, Station 325; shore pools. 2nd February 1904. 
Temperature 32°-35°. Numerous specimens, the largest about 10 mm. long. 
These agree well with the description of this species given by CuEvreux. It is 
evident that the telson varies to some extent. CHEVREUX figures it with a seta arising 
from a slight notch on each half. Waker says “the divisions of the telson are smooth 
and rounded at the tips,” and shows it with the sides converging and convex, without 
