NOTES ON NEW ENGLAND HYDROIDS. 



C. McLean Eraser 



The few notes I have to offer on the New England Hydroids 

 would scarcely be worth publishing as a separate paper were it 

 . not that the district is visited by so many zoologists every sum- 

 mer and any information concerning the fauna should hence 

 be made available for reference as soon as possible. 



While taking advantage of the privileges offered by the U. S. 

 Bureau of Fisheries at the Woods Hole station, I had a chance 

 to get somewhat acquainted with the hydroid fauna. As the 

 "Fishhawk" was not in commission during the summer, no 

 deep sea dredging was done and hence the collecting had to be 

 restricted to shore, pile and surface collecting, together with 

 some work with the dredge or tangle in shallow waters. 



Only 47 species were obtained, but among these were five that 

 up to that time had not been reported from this region. These 

 five species were: Eudendrium vaginatum, Campmiularia rari- 

 dentata, Lovenella clausa, FileUum expansum and Sertularia 

 stookeyi. One of these, Eudendrium vaginatum has not been 

 reported from the eastern coast of North America hitherto, the 

 other four have been reported from other points along the coast. 

 The gonosome of FileUum expansum, a widely-spread form, was 

 found for the first time. The gonosome of Clytia minuta, a 

 species reported only from Woods Hole, was found for the first 

 time also. The gonosome of CJytia edwardsi, which I found at 

 Departure Bay, Vancouver Island, had not been found at Woods 

 Hole, although the original description was made from specimens 

 obtained here; many colonies with the gonosome present were 

 obtained during the summer. 



Later in the summer, I visited the laboratory at South Harps- 

 well, Me., for a week. Unfortunately, the weather was stormy 

 for a large portion of the time at my disposal there, so that I 

 had little chance to get acquainted with the region. From the 

 few observations I was able to make, it struck me that the col- 

 onies of the species I did find, appeared to be in such good con- 



