Descriptions of some Australian Pliyllopoda. 27 



very broad at the base, being movably articulated to the 

 extremity of the hand. It is abruptly bent in the middle, so 

 as to leave, when impinged against the thumb, a wide open 

 space between it and the palm. In its outermost part the claw 

 exhibits inside a somewhat rough surface, and at the tip it is 

 provided with a small, pedunculated sucking-disc (see fig. 7). 

 Inside the claw, issues from the hand a peculiar flexible ap- 

 pendage, generally turned downwards, and composed of 2 

 distinctly defined joints, the outer of which is nearly cylindric 

 in form, and densely clothed on the transversely truncated tip 

 with delicate sensory bristles. 



The succeeding pairs of legs (see fig. 8) exhibit a structure 

 similar to that in the female, except that the 4th endite car- 

 ries a cylindrical appendage clothed at the tip with delicate 

 sensory bristles, and evidently answering to the subapical ap- 

 pendage found in the 2 anterior pairs. This appendage, 

 however, on the posterior pairs becomes successively reduced 

 in size (see fig. 10), and at last wholly disappears. In the 

 9th and 10th pairs (see fig. 3) the proximal lobe of the ex- 

 opodite is not, as in the female, prolonged in a thread-like 

 manner, but is of the very same appearance as in the other 

 pairs. 



The tail (see fig. 3) does not exhibit any conspicuous 

 difference in its structure from that in the female. 



The colour of the shell also agrees closely with that in 

 the female, though the dark brown patches have perhaps a 

 still greater extension over the valves. 



Occurrence. Also of this interesting Phyllopod, several 

 well-preserved specimens were contained in the collection. 

 They were, according to the label, taken by Mr. Whitelegge 

 from 2 different localities, viz , in rock-pools of Marsubra, and 

 «near Sydney*. In the latter locality, the specimens were 

 mingled with several other Entomostraca, and were not yet 

 fully grown; but in both localities male and female specimens 



