The Library of Congress has cataloged this publication 

 as follows: 



Bennett, Robert Broadhurst, 1909- 



Background information for voluntary grade standards 

 on natural sponges. Washington, V. S. Dept. of the Interior, 

 Fish and Wildlife Service, 1958. 



00 t>. illus. 27 cm. ( r. S. Fish and Wildlife Service. Special 

 scientific report : fisheries, no. 273) 



Includes bibliography. 



1. Sponges. i. Title. (Series) 

 SH11.A335 no. 273 639.7 59-60428 



Library of Congress 



The Fish and Wildlife Service series, Special Scientific 

 Report — Fisheries, is cataloged as follows: 



U. S. Fish and Wildlife Service. 



Special scientific report : fisheries, no. 1- 

 tWashington, 1949- 



no. illus., maps, diagrs. 27 cm. 



Supersedes in part the Service's Special scientific report. 



1. Fisheries — Research. 

 SH11.A335 639.2072 59-60217 



Library of Congress (2j 



