BOT.-VOL. I.] SAUNDERS— PHYCOLOGICAL MEMOIRS. I49 



In Ncmalion andersonu Farl. San Pedro, California, 

 Aug., 1896. 



The plant is composed of an irregularly branching mass 

 of filaments running through the soft central filaments of 

 the Nemalion. Some of the branches extend out to the 

 surface and are simple ; others are once or twice dichoto- 

 mously branched near the surface. The plurilocular spo- 

 rangia are very irregular, born singly or sometimes aggre- 

 o-ated on the outer sides of the branches, not at all branched. 

 Long and colorless hairs are born on the branches with the 

 plurilocular sporangia. 



6. Ectocarpus Lyngb. 



Edocarpus Lyngb., Hydrophyt. Dan., 1819, 130. 



Plant filiform, branching, attached to the substratum by branching, creep- 

 ing filaments. Erect filaments monosiphonous, branched, occasionally corti- 

 cated by outgrowths of superficial cells ; unilocular and plurilocular sporangia 

 terminal or lateral, never intercalary. 



7. Ectocarpus acuminatus, sp. no v. 



Plate XIV, Figs. 1-5. 

 Plant minute ; creeping filaments forming a compact network ; erect fila- 

 ments simple, of the same size from base to apex, a mm. or so high ; cells 

 not at all constricted, 12-14/j broad, below as long as the diameter, above 

 2-3-5 times as long ; chromatophores elliptical, much more abundant in the 

 central part of the filament ; plurilocular sporangia sessile on the base of the 

 erect filaments or arising on a long or short stalk from the creeping filaments, 

 lanceolate, very long-acuminate, sometimes tipped with a short hair, often 

 more or less curved, 90-300/^ (rarely 400/1) x 20-30/1. 



Forms minute, light brown tufts in the conceptacles of 

 Cystoseira osmundacea. Pacific Grove, California, July, 

 1896; San Pedro, California, Aug., 1896. 



The creeping filaments ramify through between the para- 

 physes and attach themselves to the inner wall of the con- 

 ceptacle; the erect filaments extend out of the mouth of 

 the conceptacle a mm. or so; the plurilocular sporangia 

 point toward the opening or extend just out of it. 



8. Ectocarpus ellipticus, sp. nov. 

 Plate XIV, Figs. 6-9. 



Plant minute, erect, tufted, attached to the inner wall of the cryptostomata 

 or conceptacles by a colorless mass of creeping, branching filaments. Erect 



