:228 Proceedings of the Royal Society of Victoria. 



Tribe 1 — Afiostraca (Naked Phyllopods). 



Body long, very soft and flexible, and without any trace of 

 •carapace or shell. Eyes distinctly pedunculated. First pair of 

 antennae small and filiform ; second pair in the male formed into 

 a clasping organ ; in the female of a simple character. 



Family 1 — Branchipodidae. 



Body narrow, cylindrical, somewhat thicker in front, with the 

 tail well developed, and distinctly segmented in both sexes, 

 terminating in two bristle-beset caudal rami. Prehensile antennae 

 of male distinctly segmented, and usually furnished with a rudi- 

 mentary sub-branch. Frontal appendages present in the male or 

 wanting. Eleven pairs of branchial feet present, all having a 

 single serrated external covering plate. Marsupium of the female 

 -distinctly sac-formed, directed backwards, and issuing from the 

 two foremost caudal segments. — (Sars). 



Synopsis of Local Genera. 



(A) Tail with eight segments — 



1. Male claspers with 2nd joint flat and triangular; 



caudal rami very small. — Artemia. 



2. Male claspers with 2nd joint claw-shaped ; immov- 



able spiniform projection on frontal area of 1st 

 joint, caudal rami very small. — Parartemia. 



■»(B) Tail with nine seginents — 



3. Frontal appendages simple, spinulose, united proxim- 



ally, varying greatly in length ; claspers quite 

 simple, 2nd joint claw-shaped, not angularly 

 bent near the tip ; 2nd antennae of female very 

 long and ribbon-like ; ovisac stout, pear-shaped. 

 — Branchinella. 



4. Frontal appendages long, variously lobed, and spinu- 



lose ; claspers with 2nd joint possessing a sharp 

 basal spur; ovisac short and broad, eggs large, 

 and few in number. — Ciiirocephalus. 

 -5. Second joint of male claspers long, twisted, and 

 forked irregularly ; ovisac long and slender. — 

 Streptocephalus. 



