280 University of California Puhlications in Botany [Vol. 7 



If. pcnicilUformis (Rotli) Fries and the chromatophore is thinner, 

 usually more coarsely reticulate, and with many more and much 

 smaller pyrenoids. 



Spongomorpha Mertensii (Rupr.) comb. nov. 



Conferva Mirteiisii Ruproclit, Tange, 18.51, p. 40.3. 

 Conferva viminea Ruprecht, lor. cit. (fide Yendo, 1916, p. 246). 

 Cladophora Mertensii De-Toni, Syll. Alg., vol. 1, 1889, p. .317. 

 Cladophora viminea De-Toni, loc. cit., p. 318. 



Spongomorpfm arcia var. limiianea Collins, Green Alg. N. A., Suppl. I, 1912, 

 ! p. 97, in Collins, Holden and Setchell, Phyc. Bor.-Amer. (Exsicc), no. 



. 1736. 



Acrosiphonia Mertensii (Rupr.) Yendo, Notes on algae new to Japan V, 

 1916, p. 246. 



It seems best to follow Yendo {loc. cit.) in considering the Conferva 

 Mertensii Rupr. distinct, and we refer here, for the present at least, 

 the Spongomorpha arcta var. limitanca Collins. The species, as we 

 understand it, has no spiny branches or branchlets, but usually shows 

 circinate, simph' or compound, branchlets. Since we prefer Spongo- 

 morpha to Acrosiphonia, we are compelled to establish the new combi- 

 nation given above. 



Capsosiphon fulvescens (Ag.) comb. nov. 



Viva fulvescens Agardh, Sp. Alg., 1822, p. 420. 



Ilea fulvescens J. Agardh, Till Alg. Syst., pt. 3, 1882, p. 115, pi. 4, figs. 



95-99. 

 Viva aureola Agardh, Icon. Alg. Eur., 1829, pi. 29. 

 Capsosiphon aureolum Gobi, Ber. Alg. Forsch. im Finn. Meerbus., 1877, etc., 



1879, p. 88. 



We feel compelled to accept the dictum of J. G. Agardh {loc cit.) 

 that the Ulva fulvescens of C. A. Agardh is only a younger condition 

 of Ulva aureola C. A. Agardh. Since it seems to us, also, that the 

 proper generic designation is Capsosiphon, the new combination ])ro- 

 posed above is rendered necessary. 



Enteromorpha gToenlandica (J. Ag.) comb. nov. 



Monosiroma fjrocnlandicum J. Agardh, Till Alg. Syst., i)t. IN, 1SS2, p. 107, 

 pi. 3, figs. 80-83; Collins, Green Alg. N. A.. 1909. p. 208; Saunders, 

 Alg. Harriinan Exp., 1901, p. 410; Setchell iiii.i CanliuT. Alg. N. W. 

 Anier., 1903, p. 208. 



