230 Proceedings of the Royal Society of Victoria. 



Locality. — Brackish-water, Sandhills, Glenelg, coastal district 

 of South Australia. (S.A. Museum, collected by Mr. Becker, 

 1890). 



Remarks. — Of this species I have received about 100 speci- 

 mens, all of which are females and several bearing eggs, but 

 the greatest number are young forms not fully matured, and 

 probably of parthenogenetic origin. It is to be regretted that 

 there are no males amongst them, but I think there is little 

 doubt as to their being a normal Artemia. 



2. Artemia westraliensis, sp. nov. (PI. XXVIIL, 

 Figs. Al and 2). 



Description of Female. — Body of normal form ; tail of eight 

 segments, about equal in length to cephalon and trunk combined, 

 terminal segment only about one-third longer than the preceding 

 one, caudal rami narrow-lanceolate, very long for the genus, 

 being of sub-equal length to the terminal segment, and thickly 

 fringed with feathered setae. Eyes smaller and scarcely so 

 prominent as those of A. australis. 



First antennae short and slender, subequal in length to the 

 eye and its stalk. Second antennae short, slightly longer than 

 the first pair, broad-lanceolate, apically gradually tapering to an 

 acute point. Branchial legs agreeing closely in shape to A. 

 australis. 



Ovisac differing proportionately in shape from A. australis, 

 due to the lateral lobes being very much more developed (in this 

 species swelling out on each side to enormous saccular distentions), 

 and a correspondingly smaller neck ; also there are no acute 

 tubercles on the ventral face. It is considerably broader than 

 long, and does not extend as far as the end of the third tail 

 segment. 



Length. — 11 mm., exclusive of caudal rami. 



Locality. — -Lake Aurean, Murchison, West Australia. (Collected 

 by Mr. J. T. Markes, January, 1896). 



Remarks. — I have but two female specimens of this species, 

 both are of similar size, and well preserved. It may be that it is 

 congeneric with the following species, but without the male it is 

 impossible to say. 



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