Descriptions of some Australian Phyllopoda. 13 



of their inner edge, and carrying slender setæ both at the 

 edge and the lower face. The 1st endite issues with a broad 

 base, close to the coxal lobe, whereas the other endites are 

 distinctly instricted at the base. The 5th one is larger than 

 the others, smooth on the inner edge, but densely setous outside. 

 The epipodite, as also the exopodite, is much larger, and the 

 distal lobe of the latter appears rounded off and densely setous, 

 whereas the proximal one has preserved its narrow, acute form. 



The 11th pair of legs (fig. 11) exhibit an appearance 

 rather different from that in the other pairs, the 2 outer 

 appendages being peculiarly modified, so as to constitute to- 

 gether a sort of box or capsule, in which the ova are received. 

 The bottom of the box is formed by the exopodite, which 

 issues with a very broad base from the outer side of the 

 endopodite, appearing merely as an expansion of the latter. 

 The cover of the box, too, is represented by the epipodite, 

 which is bent in, so as to apply closely to the edges of 

 the anterior hollowed face of the exopodite. Of the endites 

 the outermost (the 5th) appears as an immediate continuation 

 of the stem, forming a broad, triangular lobe, setous along the 

 outer edge. 



The 12th pair of legs (fig. 12) again, assume a more 

 normal aspect, though diiFering in some points from the 10th 

 pair. Thus the stem is somewhat broader and more lamellar, 

 forming outside a distinct, ciliated expansion, and the 5th 

 endite also appears considerably broader and almost heart- 

 shaped. The exopodite is comparatively smaller, with both 

 the proximal and distal lobes rounded off. 



The succeeding pairs of legs rapidly diminish in size, 

 becoming at last extremely small and rudimentary, though still 

 exhibiting all the essential parts found in the other pairs. 



Fig. 13 exhibits a leg of one of the posterior pairs, magni- 

 fied to the same scale as the others. It will be seen, that 

 the 4 inner endites are much reduced in size and very densely 



