288 University of California Publications in Botany [Vol. 8 



the non-piliferous cells; plate-like, perforate, with 5-10 pyrenoids, 

 that of the pilif erous cells, irregular and toothed, with 2 pyrenoids ; 

 zoospores (?) 2-ciliated, produced from non-piliferous cells somewhat 

 enlarged on the upper side. 



Pringsheim, Beitr. z. Morph d. Meeresalg., 1862, p. 1; Collins, 

 Green Alg. N. A., 1909, p. 283. 



The species of Bulhocoleon are those members of the Chaeto- 

 phoraceae whose cells are in branching filaments which bear groups 

 of specialized cells produced into continuous (i.e., non-septate) hairs. 

 They are generally endophytic in gelatinous brown and red algae 

 and have 2-ciliated zoospores. Little is known of this genus on our 

 coast and it seems more than likely that related genera provided with 

 hairs may also be found. Careful search and examination should be 

 made for Bulhocoleon and other piliferous genera of the family Chaeto- 

 phoraceae in and on the gelatinous or lubricous species of brown and 

 red algae of our coast. 



Bulbocoleon pilifer^m Pringshe 



im 



Non-piliferous cells 12-16/a diam., 2-3 times as long as broad. 



On Cimiagloia Andersonh (Farlow) S. and G. Southern Califor- 

 nia (San Pedro). 



Pringsheim, Beitr. z. Morph. d. Meeresalg., 1862, p. 8, pi. 1 ; Hazen, 

 Ul. and Chaet. U. S., 1902, p. 227 ; Collins, Green Alg. N. A., 1909, 

 p. 283. 



Thus far, Bulhocoleon pilif erum has been detected only in the fronds 

 of Cumagloiu Andersonii in southern California (San Pedro, Miss 

 S. P. Monks, Mrs. H. D. Johnston). It is likely to occur along our 

 coast northward to the region of Puget Sound at least, and also on 

 other species of algae such as those of Mesogloia, Leathesia, Scyto- 

 siphon, Chorda, Ralfsia, etc. It occurs at times so abundantly as to 

 discolor the host, but often is to be found in small quantity, giving 

 no outward (or macroscopic) indication of its presence. 



26. Entocladia Keinke 



Plants microscopic, composed of creeping, irregular, much 

 branched filaments, without hairs, growing on or within aquatic 

 plants; growth mostly by division of tenninal cells; chromatophore 

 a parietal band with one or more pyrenoids ; reproduction by 2- 

 4-ciliated zoospores. 



