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 Paramenia 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 antennae arise considerably behind the anterior antennae 

 (fig. la). The mandibles are shown in fig. 16, pi. sis. The appendage con- 

 sists of three broad joints, the first short and without setae, the second the 

 longest and fringed on one side with long setae, the third is narrow at the 

 base, but widens greatly distally, and is rounded at the end and is fringed 

 with about a dozen setae, each about as long as the joint ; on the side of the 

 last joint is an oblique row of about four or five setae. 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 setae 

 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 setae, the other joints escept the meros are plen- 

 tifully supplied with setae, 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 hi that genus. The cosa of the third pereiopod consists of two lobes 

 as in Podocerus, the anterior lobe is much larger and deeper than the 

 posterior ; in the nest coxa the anterior lobe is much smaller in comparison 

 with the posterior ; the cosa of the fifth pereiopod is not divided into lobes 

 — these facts re cosae 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 

 eosae. 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 already 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 xsi., fig. 2, a to c. 



Moera dentifera, Haswell, Proc. Linn. Soc. N.S.W., vol. iv., p. 332, pi. xx., fig. 4. 



Superior antennae 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 peduncle with several longish 



