1920] Setchell-Gardner: Chlorophyceae 205 



was collected at Sitka, Alaska. Harvey (1858, p. 87) referred 

 Ruprecht's plant to his Chaetomorpha litorca (cf. Harvey, 1849, p. 208 

 and 1851, pi. 333, under Conferva). The Chaetomorpha litorea Harv. 

 itself, judging from descriptions and figures, is closely related to 

 C. cannahinu if not identical with it. 



The Chaetomorpha confervicola (Rupr.) De-Toni (1889, p. 268) 

 is a slender attached species growing on C. melagonium at Sitka 

 (cf. Ruprecht, 1851, p. 397). This is suggested as being the j'oung 

 attached state of Chaetomorpha tortuosa {Rhizoclonium tortuosum 

 of this account), but it seems fully as probable that it may be the 

 3'oung and attached state of C. cannahina. 



6. Chaetomorpha torta (Farlow) ]McClatchie 



Filaments rigid, attached when young, soon becoming declined, 

 loosened and entangled among other algae, much coiled and contorted, 

 40-60 cm. long, up to 1 mm. in diam., nearly uniform throughout with 

 segments slightly moniliform, 1-1.5 times as long as broad; color 

 iridescent bluish green. 



Growing in the sublittoral belt. Southern California. 



McClatchie, Seedless plants, 1897, p. 351 (nomeii nudum) ; in 

 Yendo, Notes on algae new to Japan II, 1914, p. 264 (excl. syn. C. 

 spiralis). Chaetomorpha clavata var. torta Farlow, in Farlow, Ander- 

 son and Eaton, Alg. Exsicc. Amer.-Bor., fasc. 5, 1889, no. 211 (noinen 

 nudum); Collins, Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), 

 fasc. XII, 1899, no. 571 (nomen nudum) ; Farlow, in Collins, Green 

 Alg. N. A., 1909, p. 323 (descr.). Chaetomorpha clavata Collins, 

 Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), no. 371 (not of 

 Kuetzing). 



Ch-aetomorph<i torta is confined, so far as our knowledge goes, to 

 the coast of southern California. It is so different from any of our 

 other species as to be readily recognizable by its scattered or massed, 

 long, coarse, contorted and even spirally coiled, rigid filaments of a 

 peculiar light bluish green color. In searching for any trace of an 

 attachment, our persistence was rewarded by the discovery of one 

 among all the material examined and that, curiously enough, was 

 found on no. 211, of Farlow, Anderson and Eaton's Algae Americae 

 Borealis Exsiccatae. The rhizoids are slender, blunt, somewhat 

 branched, and evidently were attached to a rock surface. The basal 

 segment is slightly attenuated below and about 2 mm. long. The 



