CONTENTS 



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 34^ 



The evolution of the species of loplion, and its significance in relation to 



other Antarctic species of Ectyoninae 34^ 



Geographical distribution 35 ^ 



Embryonic development and breeding seasons 359 



Unattached sponges 37^ 



The value of external form in the identification of sponges 375 



The abundance of sponges in the Antarctic and its geological significance . 378 



List of literature 3^0 



Index 385 



Plates XLVIII-LVII following page 392 



