Neiv Victorian FresJt-water Amphipoda. 51 



freely spiuulose ; basos of each well expanded, the hind margin 

 €venly curved and minutely serrate. 



Uropoda with the peduncles of each extending to an even 

 -distance behind, first two pairs with outer ramus a little shorter 

 than the inner, upper margins thickly fringed with little spines. 

 Terminal uropoda extending to the limit of the lower pair, rami 

 lanceolate, margins fringed with little spines and a few plumose 

 setae. 



Telson of even width to its length, deeply cleft, lateral edges 

 ■almost straight, apex of each piece broadly rounded and bearing 

 three setae, also a little below, one on each of the inner and 

 •outer sides. 



Colour. — Spirit specimens uniformly yellow. * 



Leiigtli. — 10 mm. 



Occurrence. — From a rivulet near Wood's Point ; altitude 

 about 3000 feet (collected by Mr. S. W. Fulton). 



Remarks. — This species agrees well in general characters with 

 Atyloides gabrieli, described in my last paper; it is, however, 

 more normal to the genus as instituted by Stebbing, notably in 

 the inner lobe of the first maxillae bearing a lateral fringe of 

 many plumose setae (not only tipped by three), also by the 

 mandibular palp i5ot being so widely expanded. The only 

 notable feature of difierence from the other known species of 

 that genus appears to be in its possession of a distinctly lobed 

 wrist in the gnathopods ; in all other respects it is in close 

 agreement. In the latter respect it agrees with Calliopius, but 

 that genus has the telson entire, and the upper antennae have no 

 accessory appendage. From Pontogeneia, with which Atyloides 

 appears to be closely allied, it differs in possessing a secondary 

 antennary appendage, as well as by the lobed wrists. In both 

 Calliopius and Pontogeneia also the antennae, of at least the 

 male, bear numerous large calceoli on the antennae, which does 

 not appear to be the case in any of the Atyloides, certainly not in 

 my two species. 



Gammapus austraiis, Sayce. 



Proc. Roy. Soc. Vict., xiii., n.s., pt. 2, pp. 233-237, pi. xxxix. 

 Since describing this species, I have received some further 

 specimens of it, and am now able to define the sexual characters. 



4a 



