DescrijDtions of some Australian Phyllopoda. 41 



ing in length the 3rd. The epipodite, or gill, is comparatively 

 small and narrow. The exopodite is, on the other hand, very 

 fully developed, its proximal lobe especially being exceedingly 

 large, projecting far beyond the epipodite, and advancing over 

 the side of the body (see fig. 3). The said lobe is lamellarly 

 expanded, rounded at the tip, and edged all round with densely 

 ciliated setæ. The distal lobe of the exopodite is much nar- 

 rower, but rather elongated, extending almost to the tip of 

 the 5th endite. 



In the 5 posterior pairs of legs the epipodite is wanting, 

 and the 3 outer endites much reduced in size, though well 

 definable even in the last pair. 



The 9th and 10th pairs of legs (fig. 9) differ from the 

 others in the peculiar development of the proximal lobe of 

 the exopodite, which has assumed the form of an almost 

 cylindric appendage suddenly recurved at the tip in a hook- 

 like manner. It is evident that these appendages must have 

 the same significance as the thread-like appendages found in 

 the corresponding legs in Eulimadia and Estheria, viz., that of 

 supporting the egg-masses. In the last 2 pairs of legs, the 

 exopodite is only represented by the distal lobe. 



The eggs are rather numerous and conglomerated to 2 

 cake-like masses occurring on each side in the posterior part 

 of the shell-cavity (see fig. 3). The eggs themselves (fig. 12) 

 are perfectly globular, and their envelope only finely dotted. 



The colour of the shell in alcoholic specimens is light 

 corneous, but may probably have been different in the living 

 state of the animal. 



Description of tlie male. 



(PI. 7.) 



The shell of fully grown male specimens is of about the 

 same size as that of the female, and exhibits also a very similar 



