On Australiafi Entomostracans. 69 



the genus after my old college friend the Eev. W. O. 

 Newnham, in memory of many pleasant excursions in his 

 company in the neighhourhood of Cambridge and Farnham, 

 in search of zoological and botanical wonders. The ocular 

 tubercle, being in fact the window through which the little 

 animal looks out upon the world around him, has supplied 

 a specific name. 



Locality ; — common in ponds. 



Entomostraca. 



It may be useful to add here a list of the Fluviatile Ento- 

 mostraca, so far as they are known to the author, with a short 

 note of each of the particulars by which these species may 

 be distinguished from each other. I have deposited a 

 drawing of each species in the Australian Museum. 



Legion I. Branchiopoda. 

 Order I. Phyllopoda. 



Fam. L 



APODIDiE. 



Genus I. Aj)us. 



I have not seen this Australian Apus, but know only that 

 it has been found in the Hunter Eiver district, and at the 

 Murrimbidgee : I should be very much obliged to any 

 observer who would send me specimens in spirits. The 

 Tasmanian species have been described by Mr. Baird in the 

 Annals of Natural History, under the name Lej)idurus 

 viridis. 



I am indebted to E. 0. Gunn, Esq., for some specimens 

 of this very interesting Entomostracon, which I hope ere 

 long to compare with our Australian species. 



