I III. A.LGAE m| BERM1 DA. 



2. Cells 5-7 n diam. E. minima. 



:;. Fronds simple or with a few proliferations. 1. 



;;. Fronds more or Less branched. 5. 



I. Fronds inflated and flexuous. E. flexuosa. 



4. Fronds compressed-filiform. 3. E. tnarginata. 



5. Branches largely monosiphonous. I. E. plumosa. 



5. Branches not monosiphonmH, except occasional proliferations. 



4. E. prolifera. 



1. E. plumosa Kiitzing, L843, p. 300, PL XX, fig. 1; Collins, 1909, 

 p. 19S; Borgesen, 1913, p. 7; P. B.-A., No. 2065; /.. HopHrkii 



Vickers, 1908, PI. V. Rein, as E. percursa; North Shore, Jan., 

 Gibbet Island, Feb., March, Devonshire Bay, Feb., Harris Bay, 

 March, Hervey; Tucker's Town, Harrington Sound, Shelly Bay, 

 April, Hungry Bay, May, Inlet, Aug.. Collins. The most frequenl 

 species of the genus here and quite distinct from our other form-. by 

 the rather large, longitudinally seriate cells, and the many branches 

 of a few series or a single series of cells. Sometimes long, subsimple 

 branches occur, of two series of cells, much resembling E. percursa 

 J. Ag, with which a plant of this kind was identified by Rein. 

 It is the E. plumosa of Borgesen, the E. Hopkirkii of Vickers, as shown 

 by authentic specimens; whether the plants passing under these 

 names in the North Atlantic are identical with this and with each 

 other may be questioned. If there should prove to be two specie-. 

 an examination of original specimens would be needed to decide what 

 names to use. 



2. E. minima Nageli in Kiitzing, 1849, p. 482; 185G, p. 16, PL 

 XLIII, fig. 3; Collins, 1909, p. 201; P. B.-A., No. 2005. Grasmere, 

 March, Hervey; on old fish car, Hungry Bay, April, in drip from 

 outlet of aquarium, Agar's Island, Aug., Collins. 



3. E. margixata J. G. Agardh, 1842, p. 1(5; Kiitzing, L856, p. 15, 

 PL XLI, fig. 1; Collins, 1909, p. 202. On old Sargassum, below 

 Flatts Bridge, May, Collins. 



4. E. prolifera (Fl. Dan.) J. G. Agardh, 1882, p. L29, PL IV. 

 figs. 103-104; Collins, 1909, p. 202; Vim 'prolifera Flora Danica, 

 Vol. V, p. 5, PL DCCLXIII, 17^2. Rein, a- E. compressa. Rein's 



imen is the only one of the species that we have seen from Ber- 

 muda, but it may be not uncommon. Little branched forms might 

 easily be mistaken for /•,'. minium or E. flexuosa, until examined micro- 

 scopically. 



5. E. flexuosa (Wulf.) J. C Agardh, 1882, p, 126; Collins, L909, 

 p. 203; P.B.-A., No. 2004; Conferva J Wulfen, 1803, p. L5. 

 Miss Penis ton; Harrington Sound. Feb., Dec., Devonshire Bay, Feb., 



