Ostracod and Shell Marl of Pleistocene Age. 27' 



Class CRUSTACEA. 



Super-order OSTRACOD A. 



Fam. CYPRIDAE. 



Genus CYPRIS, Miiller. 



Cypris mytiloides, G. S. Brady. (Plate III., Figs. 5, 5«.) 



Cypris mytiloides, G. S. Brady, 1886, Proc. Zool Soc. Lond.. 

 p. 89, pi. IX., Figs. 1-3. 

 Observations — This species was first described from Kangaroo 

 Island, S. Australia. It is a well known living form in Victorian; 

 swamps and lakes, and I have examples from the Yering Flats, 

 near Lilydale. 



The carapace of C. mytiloides, seen laterally, appears to be- 

 generally rather broader than in the majority of living specimens, 

 but this difference is only sub-varietal. Average length of cara- 

 pace, 3.2 mm.; breath, 1.4 mm.. The type specimen of Dr. Brady, 

 supplied by Prof. Tate, has a length of 5 mm. 



Occurrence. — In the Boneo Swamp deposit this species is very 

 abundant. 



Cypris sydneia. King. Plate IV., Figs. 6, 6a. 



Cypris sydneia, King, 1855, Proc. R. Soc. Tasmania, vol. 



III., pt. I. p. 65, pi. X. Fig. M. 

 Cypris cilidta, Thomson, 1879, Trans. N.Z. Inst., vol. XL. 



p. 253, pi. XL Fig. A, la-g. 

 Cypris sydneia. King, G. O. Sars, 1894, Vidensk, Selsk,. 

 Skrifter. I. Math. Nat. Kl. No. 5, p. 27, pi. IV., Figs,. 

 2o.-c. Id., 1896, Freshwater Entom. from neighbour- 

 hood of Sydney, Kristiania (Alb. Cammermeyers For- 

 lag), p. 50. 

 Observations. — C. sydneia was originally described from speci- 

 mens taken in a swamp near Woolloomooloo Bay, Sydney, and Mr. 

 Whitelegge collected it from Bourke Street, Sydney. The New 

 2^aland localities are — lagoons in the neighbourhood of Dunedin ;: 

 a pond at Eyreton, North Canterbury district; ditches at Kaitaia, 

 N. Island. 



The present examples are quite typical, and the shape and posi- 

 tion of the muscle-spots agree with the figures given by Sars, of the- 

 New Zealand specimens. The surface of the shell is sparsely punc- 

 tate, and from each punctum there is a faint stria directed pos- 

 teriorly. 



