150 THE VICTORIAN NATURALIST. 



S. elizabethce, King, Sars, Arch. Natur, Christiania, xviii., No. 3, 

 pp. II and 12. 



I have found this handsome species abundantly at Heidelberg. 

 Up to the present no ephippial females or males have come under 

 my notice. This form has kept very well in a small aquarium, 

 increasing moderately during the last eight months. 



Distribution. — Near Rockhampton ; near Sydney (Sars) ; 

 neighbourhood of Melbourne. 



S. acutirostratus, King (syn. S. paradoxus. Schoedeler ; Daplmia 



elizabethce, var. acutiros trains, King). 

 S. acutirostratus, Kmg, G. O. Sars, Arch. Natur, xviii,, No. 4, 



p. 12, plate ii., fig. 1-3. 



A few fine specimens were taken at Mordialloc during 

 September. It can be easily distinguished from the preceding 

 species by the acute rostrum, also in being much larger and of a 

 deep green colour. 



Distribution. — Near Sydney (G. O. Sars) ; Mordialloc. 



Genus — Moina, Baird. 



Moina tenuicornis, G. O. Sars, Arch. Natur, Christiania, xviii., 

 No. 3, pp. 24-27, plate iv. 

 This is a very abundant species, increasing at an astonishing 

 rate. The body of the female has an orange tinge. The males 

 are highly pellucid. 



Distribution. — Near Sydney (G. O. Sars) ; neighbourhood of 

 Melbourne. 



. Family — Chydorid^. 



Genus — Pleuroxus, Baird. 



Pleuroxus inermis, G. O. Sars, Arch. Natur, Christiania, pp. 

 31-35, plate v., figs. 8 and 9. 



This very small species was reared by me from some mud 

 taken at Heidelberg. It generally keeps close to the bottom, 

 swimming about at a very rapid rate. 



Distribution. — Near Sydney (G. O. Sars) ; neighbourhood of 

 Melbourne. 



EXPLANATION OF PLATE. 



Fig. I. — D. cariiiata, typical form ; s, spine. 



Fig. 2. — D. car mala, variety ; e, ephippium. 



Fig. 3. — S. elizabethce; f^-f^, feet (five pairs); e, eye; oc, ocellus; 

 a}^, first antennas; a?, second antennas; la., labrum ; h, heart; a.c, ali- 

 mentary canal ; an., anus. 



Fig. 4. — .S". actittrostratiis ; b.c, brood cavity, containing ova, 0. 



Fig. 5. — M. tenuico'uis. 



Fig. 6. — F. inermis. 



(All figures highly magnified.) 



