OSTRACODA. 
FROM SOUNDINGS OBTAINED DURING THE CRUISES OF TIE S.Y. “AURORA?” 
(PLATES xxI AND XXII.) 
By Frepx. Cuapman, A.L.S., F.R.M.S. (National Museum, Melbourne). 
INTRODUCTORY NOTE, 
Our of a total of 118 samples of soundings and dredgings submitted for detailed 
examination of the Foraminifera, only 27 contained Ostracoda, whilst nearly all 
contained Foraminifera. 
The type of deposit which most frequently yielded Ostracoda is the terrigenous 
muds and sands, heading the list with 15 samples varying in depth from 125 to 1,320 
fathoms. Globigerina Ooze comes a close second, in having 11 samples, varying in 
depth from 706 to 2,610 fathoms. Lastly, Diatomaceous Ooze yielded a single 
Ostracod (Cythere dasyderma) at 1,900 fathoms. 
SOUNDINGS IN WHICH OSTRACODA WERE FOUND. 
The following are the soundings containing Ostracoda :— 
ANTARCTIC SUMMER CRUISE, 8.Y. “ Aurora,” 1911-12. 
No. 11.—Ist Feb., 1912. Lat. 64° 49’ §., long. 115° 57’ E. 930 fathoms. Mud, 
sand and small pebbles, with Foraminifera, Echinoid spines, and Radiolaria. 
Krithe tumida G. 8. Brady. 
No. 20.—9th Feb., 1912. Lat. 64° 34’ S., long. 96° 584’ E. 110 fathoms. Grey 
sandy and spicular mud with small stones. 
Cythere dictyon G. 8. Brady. 
Cytheropteron abyssorum G. 8. Brady. 
No. 25.—13th Feb., 1912. Lat. 65° 51’ S., long. 94° 25’ EH. 500 fathoms. Grey 
mud, 
Cythere wyville-thomsoni G. 8. Brady. 
