1^22] Skottsherg: Notes on Pacific Coast Algae 433 



(Good, et Wood.) Kiitz. in essential characters. The principal dif- 

 ference lies in the position of the tetraspores. In the latter these 

 generally are developed in minute marginal leaflets forming a fringe 

 to the old frond, but they sometimes occur along the margins of the 

 main frond (see Kiitzing, Sp. Alg., p. 874). I do not think that we 

 can attribute any great importance to this difference, which, in this 

 case, seems to be of a more biological nature. The cj^stocarps have 

 the same position in both. Schizoneura quercifolia will receive the 

 name Phycodrys quercifolia (Bory) Skottsb., and the Californian 

 species is distinguished as 



Phycodrys Setchellii, nov. spec. 



Syn. Delesseria quercifolia auctt. quoad plantam califoruicam, non 

 Bory. 



Frons primo simplex, oblonga, lingulata, brevissime stipitata, inte- 

 gra sed margine plus minusve sinuata et denticulata, mox ramificatione 

 marginali parce et irregulariter laciniata, eximie costata et opposite 

 venosa, serius e costa denudata stipitem elongatum formante prolifera. 

 Crescentia apicalis nee non structura anatomica pro genere typica. 

 Spermatangia et tetrasporangia soros inter venas formantia, cysto- 

 carpia eodem loco adspersa. Color in sicco sat obscure ruber. — Exs. : 

 Algae exsicc. Amer. Bor. num. 65. — -Hab. ad oras Californiae, cum 

 cystocarpiis et spermatangiis in cum tetrasporangia in lecta. 



The largest specimen at hand measures about 15 cm. ; simple fronds 

 and marginal proliferations are up to 10 cm. long and 3 cm. broad, 

 with their greatest width generally a little above the middle. In old 

 specimens, the lower part of the primary costa forms a conspicuous 

 stipe, and the older proliferations are distinctly pedicellate. 



Botanic Garden, Gothenbueg, Sweden, 

 October, 1921. 



