Phyllopoda of Australia. 229 



Genus 1 — Aptemia. 

 1. Artemia australis, sp. uov. (PI. XXVIL). 



Description of Female. — Body normally slender; tail of eight 

 segments, equal in length to cephalon and trunk combined, 

 terminal segment as long as the two preceding ones combined ; 

 caudal I'ami narrow-lanceolate, about half the length of the 

 terminal segment, not articulated to it. Eyes large and 

 prominent. 



First antennae relatively long. Second antennae lanceolate, a 

 little shorter than the first pair, gradually tapering from about 

 the middle of the length to an acute tip, but not drawn out. 

 Branchial feet each possessing the normal number of divisions. 

 First pair very small, rather smaller than the last. Each with 

 distal lobe of endopodite very broad, much broader than the 

 length of the exopodite, except in the last pair, where it is of 

 aV)Out equal length ; in each it is lateially produced considerably 

 beyond the level of the upper endites, with the margin evenly 

 curved, and merging into the distal margin, which runs in an 

 almost straight line to the proximal end of the exopodite. In each 

 pair of feet except the last, the second endite, as usual, is scarcely 

 marked off from the first one, and at its origin there is a little 

 tubercle ; in the last pair it is much smaller but more conspicuous, 

 and from its edge arise three much larger setae than those on the 

 first endite. In each of the other legs the two first endites are 

 uniformly fringed with feathered setae, curving upwards. The 

 third endite bears one very long, stout spiniform setae and one 

 shorter one, the former twice as long as the latter ; the fourth 

 endite has two and the fifth one stout setae, similar to the 

 shorter one on the third endite. The exopodite is about twice as 

 long as its greatest breadth, and bluntly pointed at the end. 



Ovisac, very stout, fully as broad as its length, the anterior 

 part much swollen and possessing two lateral subconical lobes. 

 On the deeply convex ventral surface there are two acute 

 tubercles, set one on each side of the mid axis. The neck is 

 short and extends to about the end of the fourth tail segment. 



Length. — 9.5 mm., exclusive of caudal rami. 



