THE HYDROIDS 209 



Verrill, A. E. 



1874 Invertebrate Animals of Vineyard Sound. 



1879 Preliminary Check List of the Marine Invertebrates of the Atlantic 

 Coast, from Cape Cod to the Gulf of St. Lawrence. 



Winther, Georg. 



1879 Fortegnelse over de i Danmark og dets Nordlige Bilande fundne Hy- 

 droide Zoophyter. 



Wright, J. Strethill. 



1859 Observations on British Zoophytes. Edinburgh New Philos. Journ., 

 New series, Vol. VII. 



