Myxophyceae 23 



Alaska. In mountain stream. Orca. (Jepson). 



51. Gloeocapsa violacea (Corda) Rabenhorst. Fl. Eur. Algar. 2: 41. 1865. 



De Toni. Syll. Algar. 5: 39. 1907. 

 Tilden. American Algae. Cent. II. no. 196. 1896; On some Algal stalac- 

 tites of the Yellowstone National Park. Bot. Gaz. 24: 198. pi. 8. f. 5. 1897; 

 Observations on some West American Thermal Algae. Bot. Gaz. 25: 103. 



1898. Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 12. no. 551. 



1899. Collins. Phycological Notes of the late Isaac Holden, — II. Rho- 

 dora. 7:235. 1905. 



Plate I. fig. 32. 



Plant mass thin, mucous or gelatinous, dull violet or grayish-violet; 

 families about 100 mic. in diameter; plants 10-17 mic. in diameter, globose; 

 sheaths not lamellose, violet or rose-colored; outer layers colorless, hyaline, 

 very wide; cells 3.5 mic. in diameter; cell contents granular, blue-green. 



Alaska. (Setchell). Connecticut. ''On vertical face of moist lime- 

 stone, east side of road and a few rods from it, a mile or so from the station 

 on the road to Bull's Bridge." Gaylordsville. October 1898. (Holden). 

 Wyoming. Valley of the Nez Perces Creek, Lower Geyser Basin, Yellow- 

 stone National Park. June i8g6. (Tilden). 



52. Gloeocapsa dubia Wartmann in Rabenhorst. Die Algen Europas. no. 



1092. Kirchner. Algen. Kryptogamen-Flora von Schlesien. 256. 1878. 

 De Toni. Syll. Algar. 5: 34. 1907. 



Farlow. Notes on the Cryptogamic Flora of the White Mountains. Ap- 

 palachia. 3:236. 1883. 



Plant mass either grumous or widely expanded, gelatinous, firm, red- 

 dish-orange, when dried generally of a dull greenish color; plants 11-24 T^ic. 

 in diameter, spherical or oblong, densely aggregated, usually associated in 

 families of twos or fours; sheaths very thick, usually twice the diameter 

 of the cell, not lamellose, soon peeling oflf; cell contents granular, brownish, 

 when dried homogeneous and bluish-green. 



Greenland. (Boergesen). New Hampshire. On rocks. Flume; Cabot 

 Mountain, Shelburne. (Farlow). 



53. Gloeocapsa sanguinea (Agardh) Kuetzing. Phyc. Gen. 174. 1843. De 



Toni. Syll. Algar. 5: 36. 1907. 



Plant mass thin, gelatinous, extended, blood red, or thicker, somewhat 

 crustaceous and black; families 25-50, rarely 140 mic. in diameter; sheaths 

 very wide, not lamellose, intensely blood red, inner layers pale red, outer 

 layers colorless or nearly colorless; cells 3.5-9 mic. in diameter; cell con- 

 tents granular, pale blue-green. 



Greenland. (Boergesen). 



Genus ENTOPHYSALIS Kuetz. Phyc. Gen. 177. 1843- 



Plant mass globose, cartilaginous, including numerous, more or less 

 confluent small families of cells; cells spherical, each surrounded by an 

 elliptical sheath, associated in families. 



