PHYCOLOGICAL MEMOIRS. 



BY DE ALTON SAUNDERS. 



CONTENTS. 

 Plates XII-XXXII. 



PAGE 



I. Some Pacific Coast Ectocarpace^ 147 



II. Sphacelariace^ and Encceliace^ of the Pacific Coast 157 



Explanation of Plates 166 



I.— SOME PACIFIC COAST ECTOCARPACE^. 



Family ECTOCARPACE.^ C. Ag. 



Ectocarpacece C. Ag., Syst. Alg., XXX, 1824. Emend. Thur. Le Jol. List. 

 Alg. Mar. Cherb., 1863. 



Plant body arising from a mass of creeping filaments or a disk-like mass of 

 cells mostly monosiphonous, more or less branched ; reproductive bodies of 

 two kinds— plurilocular sporangia formed of numerous small, densely aggre- 

 gated, linear, lanceolate, or ovoid cells; unilocular sporangia cuboidal or 

 globose. 



Synopsis of Genera. 



The basal part of the plant consisting of branching filaments. 



The plurilocular sporangia intercalary with the cells of the vegetative 



filaments Pylaiella. 



The plurilocular sporangia not intercalary. 



Basal filaments mostly superficial Ectocarpus. 



Basal filaments ramifying through the tissue of the infested plant 



Streblonetna. 

 The basal part of the plant consisting of a cellular, disk-like mass. 



No paraphyses Phycocelis. 



I. Phycocelis Stroemf. 



Phycocelis Stkcemf., Not., Ill, 1888, 383. 



Plant small epiphytic, the basal part consisting of one or two layers, more 

 or less circular in outline, increasing by peripheral growth. Erect filaments 

 present; unilocular sporangia and paraphyses unknown; plurilocular sporangia 

 sessile or stout; zoosporal cells mostly erect in a single row. 



[ 147 ] Oct. 29, 1898. 



