LIST OF COLLABORATOKS FOR THE 

 SECOND EDITION 



Dr. Joseph Augustus Cushman, Foraminifera. 



Dr. T. Wayland Yaughan, Adinozoa. 



Dr. EuDOLF EuEDEMANN, GmptoUtoidea. 



Mr. Frank Springer, Cystoidea, Blastoidea, Crinoidea. 



Dr. Arthur Hobart Clark, Post-Paleozoic Crinoidea. 



Dr. Hubert Lyman Clark, Asteroidea, Holothuroidea . 



Dr. Robert Tracy Jackson, Echinoidea. 



Dr. Ray S. Bassler, Bryozoa. 



Prof. Charles Schuchert, Brachiopoda. 



Dr. William Healy Dall, Pelecypoda, Gastropoda {jmrs). 



Prof. James Perrin Smith, Ammonoidea. 



Dr. Percy E. Raymond, TriloUta. 



Dr. Charles D. Walcott, TriloUta {pars), Arachnida (pars). 



Dr. Ray S. Bassler, Branchiopoda, Ostracoda. 



Dr. William T. Calman, Cirripedia, Malacostraca. 



Dr. John M. Clarke, Phyllocarida, Arachnida. 



Dr. Alexander Petrunkevitch, Embolobranchiafa, Myriapoda. 



Dr. Anton Handlirsch, Inseda. 



