1925] Setchell-Gardner: Melanophycecu 415 



On larger Melanophyceae (Drsmarestia and the Laminariaceae). 

 Pugel Sound to central California (Carmel). 



Saunders, Phyc. Mem.. 1898, p. 155, pi. 23; Setehell and Gardner, 

 Alg. N.W. Amer., 1903, p. 238 (at Least in part). Ectocarpus con- 

 fervoides f. nanus Collins, Holden and Setehell, Phyc. Bor.-Amer. 

 (Exsicc). no. 1737 (not of Kuckuck). 



Saunders founded his f. variabilis on a plant common along the 

 coast from Puget Sound to central California. He named it, how- 

 ever, for the variable structures which he considered to be zoospor- 

 angia. but which are, most probably, undeveloped (parasitized or 

 abortive !) gametangia such as Sauvageau (1896a, pp. 41-45) has 

 shown to exist in Ectocarpus oonfervoides and other species of Europe. 

 The form, however, seems otherwise distinct and is fairly readily 

 recognized by the characters given above and indicated in the key to 

 the forms of E. confervoides. 



Ectocarpus confervoides f. pygmaeus (Aresch.) Kjellm. 



Fronds forming a more or less extended layer, 1-12 mm. (mostly 

 1-3 mm.) high, unbranched, or slightly so, above, branches only 

 slightly tapering at the apices; erect filaments 12-25/x diam., not 

 constricted at the joints, cells 2-3 times as long as the diameter below, 

 shorter above; chromatophores few, irregularly band-shaped; zoo- 

 sporangia uncertain ; gametangia terminal or lateral on the erect 

 filaments, sessile or on short pedicels and often abundant on the creep- 

 ing filaments, broadly conical or fusiform, abruptly narrowed at the 

 apex, 60-100/* long, 20-30/x broad. 



On various larger Melanophyceae. Alaska (Shumagin Islands) 

 to central California (Pacific Grove). 



Kjellman. Handb., I, 1890, p. 77; Saunders, Phyc. Mem., 1898, 

 p. 154, pi. 15, figs. 5-9; Collins, Holden and Setehell, Phyc. Bor.-Amer. 

 (Exsicc), no. 525. Ectocarpus tcrminalis Collins, Holden and 

 Setehell, Phyc. Bor.-Amer. (Exsicc), no. 1387. Ectocarpus confer- 

 voides variabilis Tilden, Amer. Alg. (Exsicc), no. 358. Ectocarpus 

 pygmat us Areschoug, iu Kjellman, Skand. Ectocarp., 1872, p. ^~->. 



3. Ectocarpus acutus S. and G. 



Fronds 5-9 cm. high, dark brown when dried, olive green when 

 living, feathery; erect filaments more or less entangled and fasciculate 

 below, free above, profusely branched, main filaments densely cor- 

 ticated; branches mostly alternate, strict; ultimate ramuli often 



