i LIN8 \\i> in i;\ El . 



."». o. Corallinaj Gomont, L893, ,,. 238, PL \ I. fig. 21. On 

 ('odium toinrtitosuiii, Cooper's [sland, April, Collins. 



*C). ( ). li.M i- Ag. \;ir. hcrgestina Etabenhorst c\ Gomont, 1893, 

 j). 241. Among other algae in a ditch in meadow by Shelly Bay, A 

 ( lollins. 



*7. 0. amphibia Gomont, 1893, p. 241, PI. VII, figs, i 5; P.B.-A., 

 No. L852. In brackish pool among other algae, April, Aug., Collins, 



*S. o. ammia v Gomont, L893, p. 246, PI. VII, fig, \k Forming a 



thin coating On POck at Inlet, Aug., Collins. 



*<). (). laeteyirens Crouan e\ Gomont, L893, p. 246, PI. VII, 

 fig. 11. Among other algae, Tucker's Town, May, Collins. 

 *1(). (). Formosa Bory ex Gomont, L893, p. 250, PI. VII, fig. 16. 



In a puddle of rain water in road, April, Collins. 



11. (). longearticulata Hansgirg ex Porti, 1907, p. 17(3. On 

 ('odium, near Causeway, April, Hervey. We have not seen an au- 

 thentic .specimen of tin- species, l»ut our plant agrees with the original 

 description, with no description in Gomont, and with none hut this 

 in Forth 



Trichodksmkm Ehrenberg. 



T. Tiiiebautii Gomont, 1S93, p. 217, PI. VI, figs. 2-4; Wille, 1904, 

 p. .57, PI. I, figs. 17-22. Hamilton Harbor, Wille, 1. c. 6 



Phormidium Kiitzing. 



1. Trichomes strongly moniliform. 1. P. fragile. 



1. Trichomes not moniliform. 2. 



2. Stratum purple or pink. 2. P. luridum. 



2. Stratum greenish or blackish. .;. 



3. Trichomes 3 m diam. or less. 3. P. valderiamim. 



3. Trichomes 4r-12 m diam. 4. P. Retzii. 



1. P. fragile Gomont, 1893, p. L83, PI. IV. figs. L3 15. Among 

 other algae in an incrustation in rock between tide marks, April, 

 Collins. 

 *2. P. luridum Gomont, 1893, p. 185, PI. IV, figs. 17 18; P. P.. -A., 



8 Catagnymene pelamca Lemmermani] \ar. major Wille, L904, p. 51. pi. I, 

 fig. 7, i- reported by Tilden, L910, p. 159, as occurring :it Bermuda, but we 

 are unable to obtain any confirmatory evidence. Wille, 1. e., reports it from 

 open sea. ;it several points. Dermocarpa Leibleinii (Reinsch) Hornet var. 

 pelagica Wille, also appears in Tilden, 1910, p. 55, as from Bermuda, od 

 authority of Wille, 1904,p.50; but Wille's record is 39 4' N.,Long.57 8' W .. 

 " ungefanr in der Mitte zwischen den Bermuda-Inselo und New Foundland. 



