BY GEO. M. THOMSON", F.L.S. 65 



stronger and more curved. The uropoda decrease in length 

 posteriorly, the last pair being very short ; the outer branch of 

 this pair ends in a stout terminal, and two short lateral 

 spines, the inner is short and quite rudimentary ; the telson 

 appears to be cleft to the base, and each lobe to end in two 

 small spines. Unfortunately my observation was made from 

 the side, as I had mounted my only specimen as a permanent 

 slide before I observed this detail from above. 



Length, 6 mm. (about \ inch). 



Colour, nearly white. 



I7it€gument, very hard and brittle, without any markings. 



Fam. AtylidcB. 



19. Afyloides tasmanice. Nov. sp. (PI. ii., figs 9-15 ; PL iii., 

 figs. 1 and 2.) 



The specimens referred to this genus agree in nearly all 

 respects with Stebbing's definition (" Challenger " Ampbipoda, 

 p. 913). In the first antennae, however, I can discover no trace 

 of the small accessory flagellum ; but this is such a small organ, 

 that, except in dissected specimens, it would be easily over- 

 looked. The first maxillsD, also, have only about sis set^e on 

 the inner plate, in this respect resembling Stebbing's genns, 

 Atylopsis, from which, however, it difiers in not having the 

 upper lip bilobed. 



The body is compressed, perfectly smooth (minutely rugose 

 under a high power), and not in any way carinated dorsally. 

 The front of the cephalon is hardly produced between the 

 rather large subquadrate eyes. 



The first antennce (fig. 9) are about half as long as the body ; 

 the joints of the peduncle are short and broad, diminishing in 

 size distally, and are densely tufted on the ends of the lower 

 margin with setse ; the flagellum is nearly twice as long as the 

 peduncle ; the joints are broader than long, and at intervals of 

 half a dozen or more (fewer at the proximal end) occurs a 

 broader joint tufted with the auditory (?) setae so characteristic 

 of this and allied genera. In one dissected specimen the 

 flagellum had about forty articulations. 



The second antennce (fig. 10) are sab-equal in length with 

 those of the first pair ; the second joint of the peduncle has a 

 stout spine at its lower extremity, while the next three joints 

 are sub-equal in length, and are tufted with numerous seta? on 

 the end of the lower margin; the flagellum is between two 

 and three times as long as the peduncle ; the joints are very 

 numerous, are broader than long, and about every second is 

 tufted with minute setse ; the upper lip is rounded and not 

 incised. 



The mandibles (fig. 11) have seven slender spines serrated oa 



