CONTENTS 



Page 

 Part 1. The Salpidae collected by the United States Fisheries steamer 

 Albatross in Philippine waters during the years 1908 and 1909. By 



Maynard M. Metcalf 1 



Part 2. The Salpidae: A taxonomic study. By Maynard M. Metcalf, 



with the assistance of Mary M. Bell 5 



The Cyclosalpas in general 49 



The Traustedtias in general 154 



The Salpidae in general 155 



Structure and relationships within the family 155 



Speciation 161 



Origin of the Salpidae 162 



Distribution of the Salpidae 166 



Unidentifiable species of Salpidae and species of doubtful validity. 171 



Generic and subgeneric names 173 



Key to the subgenera and species of Salpidae 173 



Literature cited 176 



Appendix 183 



Index 191 



Part 3. Pyrosoma: A taxonomic study based upon the collections of the 

 United States Bureau of Fisheries and the United States National 



Museum. By Maynard M. Metcalf and Hoyt S. Hopkins 195 



Introduction 195 



General description 199 



General considerations 258 



Relationships within the family 258 



Origin and relationships of the family Pyrosomidae 260 



Speciation 261 



Individuality and form control 261 



Geographical distribution 263 



Literature cited 266 



Index 273 



Part 4. Silicious and horny sponges collected by the U. S. Fisheries 

 steamer Albatross during the Philippine expedition, 1907-1910. 



By H. V. Wilson 273 



Contents iii 



Introduction 273 



Systematic description 277 



Bibliography 497 



Index 523 



Part 5. The shipworms of the Philippine Islands. By Paul Bartsch 533 



66587—32 m 



