CONTENTS 



Page 



Introduction 5 



List of Opisthobranchiate Mollusca Collected by the 



Branner-Agassiz Expedition 6 



List of Opisthobranchiate Mollusca Thus Far Re- 

 corded FROM THE Coast of Brazil .... 7 



Detailed Descriptions of the Species Collected — 



1. Tethys dactylomela (Rang) 14 



2. Tethys cervina Dall and Simpson 38 



3. Pleurobranchus agassizii sp. nov 59 



4. Discodoris branneri sp. nov. 66 



5. Discodoris voniheringi sp. nov 73 



6. Peltodoris greeleyi sp. nov 84 



7. Spurilla braziliana sp. nov 91 



Literature Cited 100 



Explanation of Plates 105 



