260 Transactions.— Zoology. 
I have been much puzzled by this and the next two species, and it is 
only with considerable hesitation that I advance Paranenia as a new genus, 
In order to clear up their affinities as much as possible I give here a few 
more facts about them which I have not put into the description already 
given. The inferior antenne arise considerably behind the anterior antenne 
(fig. 1a). The mandibles are shown in fig. 15, pl. xix. The appendage con- 
sists of three broad joints, the first short and without sete, the second the 
longest and fringed on one side with long sete, the third is narrow at the 
base, but widens greatly distally, and is rounded at the end and is fringed 
with about a dozen sete, each about as long as the joint; on the side of the 
last joint is an oblique row of about four or five sete. The maxillipedes 
present nothing very remarkable, both the basos and the ischios bear well- 
developed plates, that of the basos is rectangular and has only a few sete 
at the end, that of the ischios is rounded at the end and has the inner 
margin supplied with numerous stout broad spines which increase in size 
distally, and with several sete, the other joints except the meros are plen- 
tifully supplied with sete, the dactylos ends in a long slender claw distinct 
from the basal portion. 
The gnathopoda have been already described, the pereiopoda closely 
resemble those of Podocerus but are rather longer and more slender than is 
usual in that genus. The coxa of the third pereiopod consists of two lobes 
as in Podocerus, the anterior lobe is much larger and deeper than the 
posterior ; in the next coxa the anterior lobe is much smaller in comparison 
with the posterior; the coxa of the fifth pereiopod is not divided into lobes 
—these facts re cox® of third, fourth and fifth pereiopoda refer to the male 
only; I have not yet been able to verify them in the female; the bodies are 
so delicate and transparent that it is often very difficult to distinguish the 
coxe. The telson has one or two very minute teeth at the end of each 
conical projection, these are very small but may be important as a help to 
deciding the proper place of this species among the other Amphipoda. 
My reasons for considering the two animals I have described above as 
male and female of the same genus are the same as those Prset given in 
the case of Podocerus longimanus. 
The length of the palm of the second gnathopod of the male increases 
with age, in well-developed specimens the tooth defining it is near the base of 
the propodos, but in younger specimens it is often much nearer the distal end. 
Paranania dentifera. Pl. xxi., fig. 2, a to c. 
Moera dentifera, Haswell, Proc. Linn. Soc. N.S.W., vol. iv., p. 332, pl, xx., fig. 4. 
Superior antenn® equal in length to the cephalon and first four segments 
of the pereion; third segment of the peduncle two-thirds the length of the 
second ; flagellum about as long as the last two segments of peduncle, of 
about ten articuli, each ornamented like the pedunele with several longish 
