CONTENTS 



Page 

 Part 1. Marine diatoms of the Philippine Islands. By Albert Mann. 



Published June 27, 1925 1 



Introduction 1 



Similarity of Campeche Bay and Philippine Islands diatom floras 5 



List of Campeche Bay-Philippine diatoms 7 



Nomenclature 9 



Genera and species, with systematic discussions 10 



Part 2. Additions to the polychaetous annelids collected by the United 

 States Fisheries steamer Albatross, 1907-1910, including one new 

 genus and three new species. By Aaron L. Treadwell. Published 



November 20, 1926 183 



Part 3. Report on the Hydroida collected by the United States Fisheries 

 steamer Albatross in the Philippine region, 1907-1910. By Charles 



C. Nutting. Published April 27, 1927 195 



Introduction 195 



Systematic review of the hydroids 198 



Bibliography 239 



Part 4. Report on the Echinoidea collected by the United States Fish- 

 eries steamer Albatross during the Philippine expedition, 1907- 

 1910. Part 1. The Cidaridae. By Theodor Mortensen. Pub- 

 lished September 10, 1927 243 



Part 5. Four new species of polychaetous annelids collected by the United 

 States Fisheries steamer Albatross during the Philippine expedition 

 of 1907-1910. By Aaron L. Treadwell. Published October 31, 



1931 313 



Part 6. The Philippine land mollusks of the genus Opisthoporus. By 



Paul Bartsch. Published June 18, 1932_ 323 



Part 7. The Philippine land mollusks Cochlostyla rufogaster and Obba 

 marmorata and their races. By Paul Bartsch. Published August 



20, 1932 329 



Cochlostyla rufogaster and its races 329 



Obba marmorata and its races 337 



Part 8. The land shells of the genus Obba from Mindoro Province, Philip- 

 pine Islands. By Paul Bartsch. Published April 1, 1933 343 



Part 9. The tree snails of the genus Cochlostyla of Mindoro Province, 

 Philippine Islands. By Paul Bartsch. Published February 26, 



1938 373 



Index 535 



v 



