L28 ( 0LLIN8 and ill i;\ El ■ 



from the segments next below. Antheridia developed from lea 

 conical-ovoid. Color rosy red; Bubstance soft 



Prom the few 4-tubed species of Lophoriphonia this is distinguished 

 by branching characters, but specially by the great development ol 

 the rhizoids, which show a remarkable adaptation to its habitat, the 



fronds of ('odium. The rhizoids take the shape of utricle.-, of innch the 

 same shape and size as those of the host, but in reversed position. At 

 first a relatively slender cell, cyclindrical, or occasionally flattened in 



a line with the axis of the filament, as -<><>n a- the rhi/.oid has pene- 

 trated between the stouter parts of the Codium utricle- it expand.-, 

 and wedges it-elf in tightly among the latter. As seen under the 

 microscope, there is a striking contrast between the rosy color of (un- 

 set of utricles, and the green of the other. Type in ( tolling herbarium, 

 No. 7456, Gibbet [sland, March, L913, Hervey; also from Gibbet 

 Island, Jan., Smith's Bay, March, Hervey; Tucker's Town, April, 

 Cave near Ducking Stool, Hungry Bay, May, Collins. 



I.. ..i:-, . i; A Ag.) Falkenberg, L901, p. 500; P. B.-A.,No. 1892; 

 Hutckinna onscurn Agardh, L828, p. 10S; Polysiphonia ohscura 

 Harvey, L846 51, PI. ('II. A. Moseley, as Polysiphonia ezilis; 

 Smith's Bay, Spanish Hock. Jan., Gibbet Island, March, Harrington 

 Sound, Dec, Hervey; North and South Shores, April, May, July, 

 Aug., Collins. Common everywhere on rocks between tide marks, 

 and in caves, where in well sheltered places it reaches even above 

 ordinary tides. It varies considerably in size and in luxuriance of 

 branching, but is not likely to be mistaken for any other 

 Young plants bear long hairs (leaves) in dense branching tuft-. 



Bostrychia Montagne. 



1. Main axis eeorticate. 

 1. Main axis corticate. 

 2. Long inonosiphonous ramuli present. 



2. Only a few terminal segments inoiio.-iphonou<. 

 3. Tips of branches incurved; rather COai 

 3. Brandies straight; slender. 



1. B. BrVTTLAEI8 IIar\ey, L853, p. 57, PI. XIV. D. Wal-ingham, 

 April, Hervey. This species, the only one occurring as far north as 

 New England, has been found only once in Bermuda, and then in a 

 (piite -mall form, not over 2 cm. high. It was sparingly scattered 

 among B. Montagnei. 



1 



B. rivularis. 





2. 





2. B. tenella. 





3. 





B. Montagnei. 



:;. 



B. sertularia. 



