Myxophyceae 17 



31. Gloeocapsa quarternata (Brebisson) Kuetzing. Tab. Phyc. i: pi. 20. f. i. 



1845-1849. De Toni. Syll. Algar. 5:52. 1907. 

 Collins. The Algae of Jamaica. Proc. Am. Acad. Arts Sci. 37:239. 1901. 

 Tilden. American Algae. Cent. V. no. 499. 1901 ; Collection of Algae from 

 the Hawaiian Islands. Haw. Almanac and Annual for 1902. 113. 1901; 

 Algae Collecting in the Hawaiian Islands. Postelsia: The Year Book of the 

 Minnesota Seaside Station. 1:168. 1902. 



Plate I. fig. 18. 



Plant mass mucous, gelatinous, more or less spread out, dull, green 

 becoming blackish, or red becoming brownish; plants 7-1 1 mic. in diameter, 

 usually spherical, solitary or in twos or fours; sheaths narrow, lamellose, 

 colorless, rotund or oblong; cells 3-4.5 mic. in diameter; cell contents homo- 

 geneous or slightly granular, blue-green or greenish. 



West Indies. Roadside. Bath. Jamaica. July 1900. (Pease and Butler). 

 Hawaii. Forming a gray-green, mucilaginous coating, on wet cliffs. South 

 of Laupahoehoe, Hawaii. July 1900. (Tilden). 



32. Gloeocapsa calcarea Tilden. List of fresh-water Algae collected in 



Minnesota during 1896 and 1897. Minn. Bot. Studies. 2:29. 1898. 

 De Toni. Syll. Algar. 5:40. 1907. 

 Tilden. American Algae. Cent. III. no. 299. 1898. 



Plant mass forming a calcareous crust, light gray to light blue-green in 

 color, 2-3 mm. in thickness; plants 6-9 mic. in diameter; families 25-50 mic. 

 in diameter, composed of from 4-16 plants; sheaths colorless, somewhat 

 thin; cell contents granular, blue-green. 



Wisconsin. Forming a calcareous crust (with other lime-secreting forms) 

 on boards where spring water from trough drips down constantly. Osceola. 

 September 1897. (Tilden). 



33. Gloeocapsa zostericola Farlow. Notes on New England Algae. Bull. 



Torr. Bot. Club. 9:68. 1882. De Toni. Syll. Algar. 5:57. 1907. 



Plant mass amorphous, gelatinous, brownish; families 40-100 mic. in 

 diameter; sheaths numerous, distinct (lamellose?); cells g-ii mic. in diam- 

 eter, 19-26 mic. in length, flattened-hemisperical, concave on the inner sur- 

 face, in families of twos or fours. 



Massachusetts. On Z o s t e r a mixed with C a 1 o t h r i x. Wood's Hole. 

 August 1881. (Farlow). 



34. Gloeocapsa punctata Naegeli. Gatt. Einz. Alg. 51. pi. I F. f. 6. 1849. 

 Snow. The Plankton Algae of Lake Erie, etc. U. S. Fish Comm. Bull. 



for 1902. 22:392. 1903. 



Plant mass mucous, blue-green or gray; families 23 mic. wide, contain- 

 ing 2-16 plants; sheaths thick, not distinctly lamellose; inner lamellae difflu- 

 ent; cells .75-2.8 mic. in diameter, spherical; cell contents homogeneous, 

 pale blue-green. 



Ohio. Put-in-Bay, Lake Erie. (Snow.) 



