SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 98, NUMBER 12 



A NEW HOLOTHURIAN OF THE GENUS THYONE 



COLLECTED ON THE PRESIDENTIAL 



CRUISE OF 1938 



BY 



ELISABETH DEICHMANN 



Museum of Comparative Zoology, 

 Harvard University 



(Publication 3537) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



JUNE 14, 1939 



