240 Proceedings of the Royal Society of Victoria. 



australiensis, but are conspicuously characterised in the male by 

 the very much greater length of the frontal appendages and 

 penes, and in the female l)y no lip existing on the ventral surface 

 of the ovisac. The feet also of the middle area have the terminal 

 lobe of the endopodite considerably narrower distally. 



Genus 4— Stpeptocephalus, Baird, 1854. 



Streptocephalus (?) archeri, G. 0. Sars. Arch, for Math. 



og Naturvid, Christiania, xviii., No. 8, pp. 4-13, pi. 1. 



This species was descril)ed from a single female specimen that 

 had been raised from dried mud from a waterhole, salt at high 

 tide, 20 miles from Rockhampton. On account of the sex its 

 generic position is uncertain. The following is an abreviation of 

 of Sars' description. 



Female. — Body very slender, with the trunk about the length 

 of the tail (excluding the caudal rami). Head exhibiting on the 

 dorsal face a small, but well-defined, rounded quadrangular and 

 somewhat elevated area. Eyes comparatively large. Antennnlae 

 narrow and elongated. Antennae about the length of the anten- 

 nulae, applanted, foliaceous, not compressed, and having at the 

 obtusely rounded tip a very short pointed projection. Legs 

 apparently of the usual structure, outer part of endopodite 

 broadly rounded, exopodite lamelliform, much smaller on the 

 first than on the succeeding pairs, basal plate minutely and 

 I'egularly serrated. Ovisac rather short and narrow, scarcely 

 reaching beyond the second caudal segment ; enclosed ova of a 

 very peculiar shape, being each surrounded by a tetrahedric shell. 

 Caudal rnmi very much elongated, being about half the length of 

 tail proper, and rather narrow, tapering distally, and fringed all 

 round with strong plumose setae. Body, in the living state of 

 the animal, highly pellucid, nearly colourless, cauilul rami, how- 

 ever, tinged with a vivid reddish-orange. Length of adult 

 female, 9 mm. 



Unrecognisablk Speciks. 



Chirocephalus, sp. 

 Mr. T. Whitelegge says in his list of Invertebrate Fauna 

 (Journal Royal Soc. N.S.W., xxiii., 1889, p. 318) that there are 



