Myxophyceae 55 



Canada. On Polysiphonia. Lawrence River, AnticoSti Island. 

 (Reinsch). Newfoundland. On Plocamium coccineum. Labrador. 

 (Reinsch). 



122. Dermocarpa olivaceus (Reinsch) nob. Reinsch. Contrib. Algol, et 



Fungol. i: 17. pi. 27. f. 2. 1875. De Toni. Syll. Algar. 5: 132. 

 1907. (Sphaenosiphon olivaceus Reinsch). 

 Farlow. Marine Algae New England. 61. 1881. 



Plate IIL fig. 26, 27. 



Colonies minute, expanded or somewhat hemispherical; sheaths thick, 

 lamellose; cells 9.5-17 mic. in diameter, 13-25 mic. in length, pear-shaped 

 or wedge-shaped, broadly rounded at apex, contracted at base; cell contents 

 finely granular. 



Canada. On Ceramium rubrum. Anticosti Island. (Reinsch). 

 Newfoundland. On Ceramium rubrum. Labrador. (Reinsch). 



123. Dermocarpa leibleiniae (Reinsch) Bornet var. pelagica Wille. Die 



Schizophyceen d. Plankton Expedition. 50. pi. i. f. i, 2. De Toni. 

 Syll. Algar. 5: 702. 1907. 



Plate III. fig. 28. 



Sheaths moderately thick, lamellose; cells 18-24 rnic. in diameter, 17-24 

 mic. in length, irregularly pear-shaped, prolonged at the base into a delicate 

 stalk. 



Bermudas. (Wille). 



Genus CHAMAESIPHON Braun and Grunow in Rabenhorst. 

 Fl. Eur. Algar. 2: 148. 1865. 



Plants epiphytic, erect, cylindrical, somewhat filiform, club-shaped or 

 pear-shaped, attached at base, widening upwards to free apex, solitary or 

 aggregated; sheaths present; cell walls very thin; cell contents homoge- 

 neous, blue-green, violet or yellow; reproduction by one-celled, non-motile 

 gonidia which are successively cut off from the upper portion of the con- 

 tents of the gonidangium, gradually escaping from the open apex. 



I Gonidangia usually 1-2 celled. Ch. incrustans 



II Gonidangia many-celled Ch. curvatus 



124. Chamaesiphon incrustans Grunow in Rabenhorst. Fl. Eur. Algar. z: 



149. 1865. De Toni. Syll. Algar. 5: 136. 1907. 



a 



Mobius. Ueber einige in Portorico gesammelte Siisswasser- und Luft- 

 Algen. Hedwigia. 27: 246. 1888. Harvey. The Fresh-Water Algae of 

 Maine.— III. Bull. Torn Bot. Club. 19: 124. 1892. TUden. List of fresh- 

 water Algae collected in Minnesota during 1895. Minn. Bot. Studies, i: 

 599. 1896. Buchanan. Notes on the Algae of Iowa. Proc. Iowa Acad. 

 Sci. 14: 8. 1908. 



