

Notes on Plymouth Hydroids. 



By C. C. NUTTING. 



Reprinted from the Journal of the Marine Biological Association, of the United 

 Kingdom, N. S., Vol. iv, No. 2, February, 1896. 



The following notes are based upon observations made 

 during April and the first half of May, 1S95. Although the 

 PlumularidcR were the special objects of study, a number of 

 facts concerning other forms were noticed, which, together 

 with the discussion of certain matters brought out in the 

 special study of the Plumularidce, were considered by the 

 Director to be of sufficient interest for publication in this 

 Journal. It will be understood that no general discussion of 

 the hydroids at Plymouth is attempted, nor is it my purpose 

 to give a list of the hydroid forms of that exceedingly rich 

 field, no species being mentioned unless some new fact has 

 been observed concerning it. 



EUDENDRIUM ALBUM, n. Sp. 1 



Habitat. On stones in shallow water near Millbay Chan- 

 nel. The stones are often covered with a dense growth of 

 this hydroid, which appears to the unaided eye like white 

 cottony tufts or downy patches. The gonophores were abun- 

 dant in April. 



The distinguishing features of this species are the minute- 

 ness of the colony and of the individual hydranths, both of 

 which are less than half the height of any other Eudendrium 



J This is the species referred to by Allen, Vol. iv, No. i, p. 49, of this 

 Journal. A full description, with figures, will shortly be published in Ann. 

 and Mag. Nat. Hist. 



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