172 THE ROYAL SOCIETY OF CANADA 



In previous papers, under this genus I have reported a species, 

 F. expansum Levinsen. At Woods Hole in the summer of 1911, I 

 found what I took to be the coppinia mass of that species. 27 I had 

 found specimens at various localities in the Atlantic and the Pacific. 

 In some of these the animal was present in the tube but not expanded 

 so as to appear at all without. When nearly filling the tube it has all 

 the appearance of a hydroid even to its tentacles. I have never had 

 the opportunity to section a specimen so expanded and evidently it 

 will be necessary to do so. I had seen it placed among hydroids in a 

 number of lists and no doubt arose as to its being a hydroid until 

 Kramp's paper 28 came to hand when the New England paper was in 

 course of preparation. Even with this before me, it seemed impos- 

 sible to believe that it belonged to the Bryozoa. Broch had stated 

 earlier 29 that it was probably a species of Folliculina, but I had over- 

 looked the footnote containing the notice. Since the New England 

 paper was published two papers by Dons, 30 & 31 bearing directly on 

 the matter, have come to hand. The former was published previously 

 but I had not seen it. Both Kramp and Dons have seen Levinsen's 

 material and have obtained Levinsen's admission that the species is a 

 Folliculina. The species they have worked out is undoubtedly the 

 same species that is so abundant along the east and west coasts of 

 North America. I have recently found many more specimens but 

 they do not help to settle the question, since I have not seen any 

 specimen with the zooid fully expanded. With such weight of evi- 

 dence in favor of considering it a species of Folliculina it seems better 

 to leave it out of the hydroid list, although I cannot say that I am 

 yet satisfied. An explanation is still necessary for that which I have 

 described as a coppinia mass. Nothing similar has been described 

 unless it be the cytoplasmic masses of Dons. 



Since the species seems to be quite common in the vicinity, it 

 may still be possible to get material in such a condition that the doubt 

 in the matter will be removed. 



Filellum serpens (Hassall) 



PI. XXII, Fig. 83 



Campanularia serpens Hassall, Trans. Micr. Soc, 1852, p. 163. 

 Filellum serpens Fraser, West Coast Hydroids, 1911, p. 50. 



27 New England Hydroids, 1912, p. 45. 



28 Report on the Hydroids from N. E. Greenland, 1911, p. 374. 



29 Die Hydroiden der Arktischen Meere, 1909, p. 160. 



30 Bemerkninger om Forveksling av Folliculina med Filellum, 1910. 



31 Folliculina Studien, I-III, 1912. 



