FORAMINIFERA AND OSTRACODA. CHAPMAN. 51 



APPENDIX ON THE OSTRACODA. 



This group of minute Crustacea has hardly received the 

 attention it deserves in regard to the distribution of its 

 genera and species in the Southern Ocean. Practically all 

 the previous records for that area have been made by Dr. 

 G. Stewardson Brady, F.R.S., in connection with the 

 " Challenger " material, and in his " New and Imperfectly 

 Known Species of Marine Ostracoda, 1 " in which he describes 

 some shallow-water forms from Port Phillip, Victoria. 



The genera represented in the present series comprise the 

 following : -1 Aglaia, Pontocypris, Argilloecia, Macrocypris, 

 Bythocypris, Bairdia, Cythere, Eucythere, Krithe, Loxoconcha, 

 Xestoleberis, Cytherura, Cytheropteron, Bythocythere, Pseudo- 

 cythere, and Sclerochilus. 



The forty-five species and two varieties of the present work 

 are nearly all new to the area of the Southern Ocean east of 

 Tasmania and off South Australia. 



Several of the deep-water species, such as Argilloecia affi.nis, 

 A. gracilior, Cythere pectunculata, C. sweeti, Cytherura tenui- 

 costa, and Bythocythere retiolata, have hitherto been recorded 

 only from Funafuti in the South Pacific. The depths 

 from which these examples from lower latitudes came are 

 generally greater than those of the present soundings. This 

 is only to be expected, for as a rule a widely spread fauna 

 sinks to lower depths and cooler temperatures as it nears 

 the tropics. 



Apart from the new species, several very rare forms are 

 likewise noted from these Southern Ocean dredgings. In 

 addition to those just enumerated, they are : ? Aglaia obtusata 

 (previous localities, Kerguelen Island and Funafuti), Pontocy- 

 pris gracilis (Levuka and Ram be Island), Bythocypris elongata 

 (Tristan d'Acunha), Bairdia angulata (Azores, Torres Strait 

 and South America), Cythere cytheropteroides (Cape of Good 

 Hope), Eucythere declivis (a North Atlantic species and only 

 once recorded from the southern hemisphere, viz., off West 

 Australia), Loxoconcha variolata (Booby Island and fossil in 

 the Antwerp Crag), Xestoleberis davidiana (Pleistocene in the 

 Antarctic), Cytherura cryptifera (a single carapace from off East 

 Moncoeur Island, Bass Strait), Cytheropteron coccoides (Mango 

 Island, Fiji), and Bythocythere velifera (Torres Strait and 

 West Australia). 



For valued assistance in the sorting of the material examined, 

 thanks are due to my wife. 



1. Brady Trans. Zool. Soc. Lond., v., 1866, pp. 359-393. 



