16 G. O, Sårs. 



Paramoina proposed by the present author somewhat later 

 for the Australian form Moina Macleayii King is identical 

 with that of Herrick. In some respects this genus forms, 

 as it were, a connecting link between the genera Moina 

 and Simocephalus, though evidently nearer to the first named 

 genus. The chief characters distinguishing it from Moina 

 consist in a somewhat different shape of both the carapace 

 and the head, the well-developed fornix of the latter, the 

 presence of a distinct ocellus, and the structure of the 

 antennae. 



Mr. Richard refers to this genus no less than 5 species. 

 In none of these, however, have the specific differences 

 been sufficiently pointed out, and I am of opinion that 

 their number ought to be greatly reduced. 



4. Moinodaplmia Macleayii (King). 



(PL III, figs 1—10). 



Moina Macleayii, King, On some of the species of Daphnidæ found 

 in . New South Wales. Papers and Proceedings of the Royal 

 Society of Van Diemen's Land. Vol. II, Part 11, p. 252, PI. V. 



Syn: Moina submucronata Brady. 



» Moinodaphnia Macquerysi Richard. 



Specific Characters. — Female. Carapace 

 in fully grown specimens rather expanded, seen laterally 

 of rounded oval form, with the dorsal margin abruptly 

 curved behind, ventral evenly arcuate throughout, posterior 

 extremity terminating in a short obtuse point located some- 

 what below the axis of the body, dorsal carina very distinct. 

 Surface of valves sculptured with very faint and somewhat 

 irregular obliquely transverse striæ, free edges armed, for the 

 greater part of their length, with minute denticles. Head 

 defined above from the carapace by a slight depression, 



