Myxophyceae 159 



Plate VI. fig. 32. 



Plant mass lead-colored, spreading over aquatic plants and damp soil; 

 filaments somewhat amorphous, fragile; sheaths very mucous, agglutinated; 

 trichomes 6-10 mic. in diameter, especially constricted at joints, usually 

 numerous within the sheath, parallel, straight; apex of trichome very 

 gradually tapering; apical cell conical or cylindrical conical, not capitate; 

 cells S-io mic. in length; cell contents showing scattered protoplasmic 

 granules. 



Florida. Moist ground. (Smith). Iowa. (Hobby). 



Genus CATAGNYMENE Lemmermann. 

 Planktonalg. Ergebn. einer Reise n. d. Pacific. 354. 1899. 



Filaments multicellular, floating free, surrounded by thin, close sheaths, 

 enclosed in widely expanded, gelatinous diffluent envelopes, separating 

 easily into fragments through the death of cells. 



I Gelatinous envelope 93-100 mic. in diameter; trichomes up to 16 mic 



in diameter, straight or curved. C. pelagica 



II Gelatinous envelope 150-168 mic. in diameter; trichomes 20-22 mic. in 



diameter, spirally coiled C. spiralis 



306. Catagnymene pelagica Lemmermann. Planktonalgen. Ergebnisse einer 



Rcise nach dem Pacific. Abhandl. d. naturw. Verein in Bremen. 

 16: 354- pl. 3. f. 38-40, 42. 1899; Algenfl. Sandwich.-Inseln. Bot. 

 Jahrb. 34: 619. 1905. De Toni. Syll. Algar. 5: 381. 1907. 

 Outer envelope 93-100 mic. in diameter, gelatinous, colorless; trich- 

 omes up to 16 mic. in diameter, straight or curved; apical cell rotund or 

 possessing a calyptra; cells very short, 3-4 mic. in length. 



Hawaii. In plankton, between the islands of Laysan and Hawaii. 1896- 

 97. (Schauinsland). 



Var. major Wille. Die Schizophyceen der Plankton-Expedition. 51. pl. 

 I. f. 7. 1904. De Toni. Syll. Algar. 5: 382. 1907. 



Plate VI. fig. 33. 



Gelatinous envelope 100-165 mic. in diameter; trichomes 21-27 mic. in 

 diameter. 



Bermudas. Plankton. Atlantic Ocean. (Wille). 



307. Catagnymene spiralis Lemmermann. Plaftktonalgen. Ergebnisse einer 



Reise nach dem Pacific. Abhandl. d. naturw. Verein in Bremen. 354. 

 pl. 3. f. 41, 47-49. 1899; Algenfl. Sandwich.-Inseln. Bot. Jahrb. 34: 

 619. 1905. De Toni. Syll. Algar. 5: 382. 1907. 

 Outer envelope 150-168 mic. in diameter, gelatinous, colorless; trich- 

 omes 20-22 mic. in diameter, spirally coiled; apical cell rotund; cells 3-4 

 mic. in length. 



Hawaii. In plankton, between the islands of Laysan and Hawaii. 1896-97. 

 (Schauinsland). 



