UAN 22 1893 MEMOIRS 



OF THE 



BOSTON SOCIETY OF NATURAL HISTORY; 



VOLUME 5, NUMBER 3. 



SYNAPTA VIVIPARA : A CONTRIBUTION TO THE MORPHOLOGY OF 



ECHINODERMS. 



By HUBERT LYMAN CLARK 



BOSTON: 



published by the society. 

 January, 1898. 



