1S88.] AUSTRALIAN CLADOCERA. 5 



derived from several localities, whereas that formerly experi- 

 mented with was taken from but a single place (Gracemere 

 Lagoon), and partly to the additional experience I had acquired 

 in preparing the aquaries. 



Of the 11 forms of Cladocera described below, I have been 

 able to identify 6 with species previously noticed, 5 of which 

 are described — though very insufficiently — by King in -Papers 

 and Proceedings of the Eoyal Society of Van Diemens Land," 

 Vol. II, Part II, the 6th by Dana, in his great work on the 

 Crustacea of the United States Exploring Expedition. The 5 re- 

 maining species I regard as new, and one of these forms repre- 

 sents moreover the type of an interesting new genus. 



As with the Cladocera previously described by the author, 

 some of the species included in the present paper show an as- 

 tonishing resemblance to well-known European forms, and hence 

 a very minute examination has been necessary to make out the 

 distinctive characters. On the other hand there are also several 

 well-marked Australian types, considerably differing from any of 

 the known Northern forms. 



The plates accompanying this paper, like those of the two 

 previous ones, have been executed with the utmost care from 

 living specimens. The method is that long since adopted by the 

 author with very satisfactory results, viz., the autograplry, a 

 particular kind of lithographic chalk having in this case been 

 exclusively employed. Subsequently the plates were printed in 

 colours from my original pencil-drawings. 



