236 Proceedings of the Royal Society of Victoria. 



and both are fringed on the inner and outer margins by very- 

 many long setae, tliose of the outer margin being very long; the 

 terminal joint is long, unguiculate, and setose. 



Gnathopoda. — -The second compared with the first, has the 

 carpus and propodus longer, and also the hind margin of the 

 propodus is convex, and not concave as in the first pair ; the 

 carpus of each is of equal length to the propodus, the anterior 

 margin bears five bunches of long stout setae, and the hind 

 margin has very many closely set transverse rows of long setae, 

 some of which in each row are finely pectinated on their edges 

 that face distally. The propodus is oblong, with the palm 

 straight, slightly oblique, and the margin setose; it is defined by 

 two spines, one larger than the other, on each of the inner and 

 outer sides, those on the outer side being almost obscured by 

 overlying setae; like the carpus, the anterior margin bears 

 bunches of fine long setae, the posterior margin is free from setae, 

 but across the outside face, there is set obliquely several trans- 

 verse rows of long setae, and in addition two or three scattered 

 fascicles. The dactylus seems invariably to bear one stout seta 

 on the outer margin, and with this exception is unclothed. 



Peraeopoda. — The first and second pairs are subequal, and are 

 a little shorter than the gnathopods. The basos is as long as the 

 following three joints combined, and has numerous fascicles of 

 rather long setae, as have also all the succeeding joints except 

 the dactylus. The carpus is shorter than the meru.s, and, in 

 addition to bunches of setae, it has four spines (one long and three 

 shorter) at the postero- and one at the antero-distal angle ; its 

 anterior margin with this exception is bare. The propodus is of 

 similar length to the carpus, its anterior margin is bare except at 

 the distal angle, and the posterior margin has a row of four equi- 

 distant spines, and also bunches of long setae. The dactylus has 

 a stout spine on the posterior or inner face, near the base of the 

 unguis. 



The third, fourth, and fifth pairs are long and subequal in 

 form to each other, the third is a little, and the fifth a very 

 little shorter than the fourth. Their armature is, in general, 

 similar to the first and second pairs, but are more spinose ; like 

 the others the dactyli bear a single spine on the inner face near 

 the base of the nail. 



