204 
Nicholls — Tino Netv Flireatoicids. 
with a number of wimple setae, in Fhrcatocoidcs three and two simple ' 
spines. Hypsimcloinis has a single spine, followed by a plumose 
seta and five others, jieetinate and cdliate. Fhrcatoicopsis apparently 
has a large number (Spencer and Hall, 1897, p. 17). Amphisopus 
retains six or seven of these setae and again, in this, links up with 
F. capcnsis, which has four plumose, and two “plumose only at the 
tip.'^ 
Upon the outer plate of the appendage there are usually 8 or 9 
setae in most Flireatoicids, but in F. typiciis they are described as 
numerous (about 14 are figured) ; in F. k'cr^^luiici I find eleven. A 
large nunilier is similarly jiresent in the Syncarida, Koonunya once 
more showing but a few. In the retention, then, of a large number 
of setae upon the lobes of the first maxilla, both Eophrvato'icus and 
Fhi'catoicus lypims may be regardeil as 2 n'‘'«erving the more general- 
ised condition. 
In the colliding hooks of the maxilli^ieds there is again a sug- 
gestion of a loss of parts, there being 4 or o in Eophrcatoiciua, 8 in 
Amphisopiis and F. australis, or 8 in F. capcnsis, F. typiciis and 
F. juyncri, with but 2 in F. assimilis. In Phrcatoicopsis the pec- 
tinate setae at the a^iex are said to continue down the outer border 
of the inner jilate (as in Eophrcafolcus) , and Imsally are three strong 
setae wliich arc not hooked. 
The condition of the gnatliopod ‘ ‘ hand, ^ ^ with its straight, ill* | 
defined palm and scarcely modified dactyl, may be regarded as dis- 
playing a primitive simplicity. Further, the largely expanded state i 
of the meros is, as pointed out above, an unusual feature in living 
Flireatoicids, but strikingly seen in the extinct F. luianamattensis. 
Something approaching it is seen in Amphisopiis and in P. capensis. 
Chilton’s figures suggest that, in the fossil form, the basos of the 
anterior as well as of the posterior series of legs was expanded. 
The a 2 J 2 )arent small size of the coxae, also seen in Amphisopus, 
should probably be regarded as due to reduction. The much more 
aiiparent condition of these structures in Fhrcatoicus may, however, 
be due to the lesser degree of develojnneiit of the 2 *i’*-^^^tdive 
(e^iimeral) margin in burrowing and Cry 2 »tozoic forms, and a conse- 
quent greater ex^tosure of these joints, but I am inclined to consider 
it as the more iirimitive condition. 
A well developed sub-chelate condition of the fourth 2 )eraeo|iod 
in the male It shares ivitli Phrcafoicus and Hyperoedesipus, this 
condition being but slightly iinlicated in A. Untoni, and the modifica- 
tion of this appendage is not much greater in F. capcnsis. In Hm- 
pliisopus, Fhrcatoicopsis, Ilypsimetopus and Fhrcatocoidcs the 
appendage is apparently unmodified. 
