9 



Marine; to be looked for on sandy shores at extreme low 

 tide-mark. 



[Note. — Tiie body is so easily injured that great care is recjidred 

 to obtain complete specimens ; but they are worth preserving if 

 the front half can he obtained in good condition.] 



FlGT'RE 11. 



A portion of a tTowded colony of I'/mronin. seen from above and 



slightly enlarged. The tentacles of the individual worms are not 



fully expanded. [PuoRonidea.] 



