Descriptions of some Australian Phyllopoda. 11 



moreover, a third function is to be stated for all the legs, viz., 

 that of locomotion. 



In all the legs (see figs 8-13) the same chief parts may 

 be found to exist, viz., the true stem of the leg, or endopodite, 

 and 2 outer appendages: the epipodite and the exopodite. 

 The endopodite projects at the base inwards as a densely 

 setous lobe, the so-called coxal lobe, and exhibits along its 

 inner edge a row of 5 more or less projecting processes, the 

 so-called endites, the outermost of which, except on the 1st pair, 

 is movably articulated to the tip of the stem. The epipodite 

 has the form of a delicate, pedunculated lamella of a peculiar, 

 as it were, spongy structure, and constitutes the chief respira- 

 tory appendage, or the true gill. The exopodite has also the 

 character of a lamella, but of a more simple structure and 

 edged distally with delicate setæ. Both these appendages are 

 attached close together to the outer side of the endopodite, 

 about in the middle, and exhibit on the whole a rather uni- 

 form appearance, except on the lltli pair, where they become 

 modified to the egg-capsule. 



The first pair of legs (fig. 8) difier in some points very 

 conspicuously from the others. They are considerably more 

 slender, and generally also more extended laterally, so as 

 partly to project beyond the edges of the carapace, which is 

 never the case with the other pairs. The stem, or endopodite, 

 as in the next succeeding pairs, is more or less bent in the 

 middle, and is composed of 4 rather distinctly defined seg- 

 ments, the last of which, however, is very small. The coxal 

 lobe is well developed, rounded triangular in form, and armed 

 with several short spines, its inner edge being moreover 

 densely clothed with stiff, incurved bristles. Of the endites 

 the outmost, or 5th, is quite rudimentary, only forming a 

 small triangular lappet not defined from the last segment. 

 The 4 other endites are, on the other hand, rather elongated 

 and slender, almost filiform, and are divided into numerous 



