SOUTHERN SPHZROMIDAE 365 
quite minute. ‘The second antenne are unusually elongate. 
It is probable that Bregmocerella tricornis, Haswell, from 
Port Jackson, is specifically as well as generically identi- 
cal with Ceratocephalus Grayanus, Woodward, from Bass’s 
Strait, although the figures given differ in some particulars. 
Circeis, Milne-Edwards, 1840. The head and _ body 
are comparatively elongate, the segments of the person 
little flexible; the first antennz: have a very large basal 
joint, with the second joint embedded in its apical emargi- 
nation; the uropods have the outer branch longer than the 
inner. Both the species are southern, and their names 
trulentuta and bidentata refer to the apical notching of the 
leon. 
y Amphoroidea, Milne-Edwards, 1840, has the first joint 
of the first antenne greatly dilated; the first segment of 
the pleon distinct but rudimentary; both the branches of 
the fourth and fifth pairs of pleopods transversely fluted for 
branchial purposes. The type-species, Amphoroidea typa, 
from Chili, seen from above and by help of the projecting 
first joints of the upper antennz, has the outline of a jar 
or amphora. Dana names a second species australiensis. 
G. M. Thomson describes Amphoroidea falcifer, from New 
Zealand, but thinks it may be identical with one or other 
of the two species just mentioned. 
Cassidina, Milne-Edwards, 1840, has the body greatly 
dilated beyond the insertions of the slender legs. The 
uropods do not reach the narrow apex of the terminal 
segment, and have the outer movable branch much smaller 
than the fixed inner one. Cassidina typa, Milne-Edwards, 
is only a third of an inch long. The species latistylis, 
Dana, is said by Miers to be a synonym of emarginata, 
Guérin-Méneville. This, according to Studer, reaches a 
length of an inch and a quarter and a breadth of more 
than four-fifths of an inch in the male, though the female, 
which is a little over an inch in length, is only two-fifths 
of aninch broad. Studer describes a third species, Cassidina 
maculata, which, like emarginata, is found at Kerguelen 
Island, and G. M. Thomson describes a fourth species, 
Cassidina neo-zealanica, from New Zealand. 
27 
