50 



AMERICAN HYDRO1DS. 



i:<itliiliflri<-nl Distribution of American Plumularidw Continued. 



ELEUTHEROPLEA Continued. 



'The percentages inlie;it' tli* ]icr cent of the total iiuitilit-r of spcri*-s of Plumularidn found in earli bathvnietrical zone; for 

 instance, there are 52 species ot EleutheropU-a in the table, 26 or 5U per cent of which are found in the 1 to 50 fathom zone. 



STATOPLEA. 



