SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE 



PART OF VOLUME XXXV 



THE APODOUS HOLOTHURIANS 



A MONOGRAPH 



OF THE 



SYNAPTID^ AND MOLPADllD^ 



Including a Report on the Representatives of these Families in the 

 Collections of the United States National Museum 



BY 



HUBERT LYMAN CLARK 



(No. 1723) 



CITY OF WASHINGTON 

 PUBLISHED BY THE S:\IITHSONIAN INSTITUTION 



11K)7 



