FORAMINIFERA AND OSTRACODA. CHAPMAN. 49 



margin of the beak. From the variety wilesensis it is dis- 

 tinguished by the latter character, and by the constantly 

 finer ornamentation of the surface. Another species closely 

 related to the above is C. alatum, G. 0. Sars 1 ; this differs 

 principally in the greater expansion of the alee. 



Station 36, east of Tasmania, 777 fathoms. Frequent. 



Genus BYTHOCYTHERE, G. 0. Sars. 

 BYTHOCYTHERE RETIOLATA, Chapman. 



Bythocythere retiolata, Chapman, Journ. Linn. Soc. Lond., 

 Zool., xxx., 1910, p. 437, pi. Ivii., figs. 26a-6. 



The occurrence of this species in the Southern Ocean is 

 interesting, since it was recently recorded from Funafuti 

 at a depth of 1050 fathoms. 



The Australian specimens differ from that from Funafuti 

 in having a less prolonged extremity, but otherwise the 

 essential features agree. 



Station 36, east of Tasmania, 777 fathoms. A left valve. 



BYTHOCYTHERE VELIFERA, G. S. Brady. 

 (Plate iii., fig. 4a-6.) 



Bythocypris velifera, G. S. Brady, Chall. Rep., Zool., i., 

 pt. iii., 1880, p. 143, pi. xxxii., figs. 5a-c. Egger, 

 Abhandl. d. k. Bayer. Akad. Wiss., xxi., Abth. ii., 

 1901, p. 463, pi. v., figs. 32-34. 



Brady records this species from Torres Strait at 155 

 fathoms, whilst Egger obtained it in dredgings from the 

 west coast of Australia at 357 metres. 



The present specimens from Cape Wiles have the alse 

 regularly and boldly curved anteriorly. The examples from 

 Station 36, east of Tasmania, agree more closely with Dr. 

 Egger 's specimens. The arrangement of muscle-spots on 

 the valve is peculiarly interesting, and they are here figured 

 for the first time. 



Station 36, east of Tasmania, 777 fathoms. A right valve. 



Forty miles south of Cape Wiles, 100 fathoms. Two left 

 valves. 



1. See Brady and Norman, Trans. R. Dubl. Soc., iv., pt. ii., 1889, p. 214, 

 pi. xx, figs. 8-10. 



