CONTENTS 



REPORT ON SOUNDINGS TAKEN DURING THE DISCOVERY INVESTIGA- 

 TIONS, 1926-1932 (published 30th December, 1932) 



By H. F. P. Herdman, M.Sc. 



Introduction page 207 



Sounding Machines 



The Scotia Arc 



Detailed Analysis of the various Sectors of the Scotia Arc 



Soundings in other localities 



Plates XLV to XLVII . 



Charts i to 7 



. 208 

 214 

 219 

 229 



following page 236 

 in separate chart case 



SPONGES (published 30th December, 1932) 

 By Maurice Burton, M.Sc. 



Introduction page 239 



Systematic List of Species 239 



List of Stations, with the names of species collected at each 243 



Descriptions of Species 254 



The Affinities of the Antarctic species of Tedania, with notes on the distribution of the 



genus generally 342 



The Evolution of the species of Iopiion, and its significance in relation to other Antarctic 



species of Ectyoninae 348 



Geographical Distribution 351 



Embryonic Development and Breeding Seasons 359 



Unattached Sponges 



The Value of External Form in the Identification of Sponges . 



The Abundance of Sponges in the Antarctic and its Geological Significance 



List of Literature 



Index 



Plates XLVIII to LVII 



• 371 



• 375 

 378 



■ ■ • 380 



■ • ■ 385 

 following page 392 



A LIST OF WORMS PARASITIC IN CETACEA (published 30th December, 1932) 

 By H. A. Baylis, M.A., D.Sc. 



Introduction 



Classified List of Parasites, with synonyms, references to literature and hosts 



page 395 



