D. C. Eaton — Algm from Eastport, Maine. 349 



Kiitzing,) were found on the S. E. side of Campobello Island, in a 

 rock-pool so high that ordinary tides would fail to reach it. 



49. Cladophora ? 



On Polyides rotundus and Gigartina, at Dog Island, etc. — Plant 

 forming deep-green tutts one-half to one inch in diameter, filament 

 .0012 in. in diameter irregularly dichotomous, siibcorymbose at the 

 ends ; cells mostly about twice as long as their diameter, rarely 2^ 

 times, often less than twice ; rootlets none. — This has much the habit 

 of C lanosa, but lacks the rootlet-like branches, and has even the 

 terminal cells very short. 



50. Cladophora flexuosa, Griffiths. 

 Collected by Prof. Yerrill and Mr. Isham. 



51. Chaetomorpha Melagonium, Weber and Mohr. 

 Tide-pools at very low levels, not rare. 



52. Chaetomorpha tortuosa, Diiiwyn. 



Grows in long entangled masses on Fxicxis and other large algie, 

 also on the piles of the wharves, quite common. 



53. Hormotrichum boreale, Harvey? 



Attached and fi'ee, in brackish pools just above high-water-mark on 

 Little Green Island, Prof. Yerrill. 



Filaments light yellowish green, very long, entangled, average 

 diameter, .0008 inch, cells from once to twice as long as their diame- 

 ter, slightly constricted at the end ; endochrome dispersed in roundish 

 granules of very unequal size. 



5-t. Hormotrichum Speciosum, Carmichael? 



Found on Chordariafiagelliformis., covering it with a dense dark- 

 green pile. Filaments one-half to one inch long, their diameter .0015 

 to .0016 inch, very uniform; cells distinct, only one-fourth to one-third 

 as long as their breadth, tlie filament slightly indented at each arti- 

 culation ; endochrome dense, a thin disk of it in each cell. I am very 

 doubtful if this be the plant figured at plate 186 B of Pliycologia 

 Brittanica. 



55. Hormotrichum Carmichaelii, Harvey. 



On lobster-cages floating in the docks at Eastport, Prof. Verrill. 

 Filaments much entangled, dark green, the diameter varying from 

 .0008 inch to .0016 or even more, cell-wall very thick, the dissepi- 



