252 University of California PuhUcations in Botany [Vol. 8 



some abnormal state or unusual treatment of the specimens. The type 

 specimens of E. fascia, as they were found in the Imperial Academy 

 of St. Petersburg in 1903, were labelled as having been collected by 

 the Luetke Expedition in Kamtschatka. 



Of specimens distributed from our coast we find in our copy of 

 the American Algae that Tilden's no. 265, under the name of E. com- 

 pressa var. complanata is E. crinita and no. 264, under the name of 

 E. comprcssa var. suhsimplex is E. plumosa. 



Most of the specimens available to us for examination are close to 

 the typical form of E. compressa but certain plants collected by one 

 of us (Gardner) at Coos Bay, Oregon, seem referable rather to var. 

 suhsimplex J. Ag. (1883, p. 137). 



5. Enteromorpha intestinalis (L.) Link 



Frond simple or having at the base a few branches similar to the 

 main frond, or occasionally a few proliferations above ; length varying 

 from a few centimeters to several meters ; diameter from 1-10 cm. ; at 

 first attached by a short cylindrical stipe, but often later detached and 

 floating; cylindrical or expanding above, more or less inflated, often 

 much crisped and contorted, and irregularly and strongly constricted ; 

 cells 10-16/x diam., in no regular order ; thickness of membrane vary- 

 ing from 50/x, below to 20/a above, generally thickened on the inside; 

 cells in cross section from 12-30//,. 



Common in its various forms from Alaska (Kukak Bay) to Mexico 

 (La Paz). 



Link, Epistola, 1820, p. 5 ; J. Agardh, Till Alg. Syst., part 3, 1883, 

 p. 131 ; Collins, Green Alg. N. A., 1909, p. 204, Mar. Alg. Vancouver 

 Is., 1913, p. 102 ; Setchell and Gardner, Alg. N.W. Amer., 1903, p. 212 ; 

 Saunders, Alg. Harriman Exp., 1901, p. 411. Ulva intestinalis Lin- 

 naeus, Flo. Suec, Ed. II, 1755, p. 418. 



Howe (1911, p. 490) has referred doubtfully a plant from La Paz, 

 Mexico, to this species. 



The following forms have been detected on our coast : 



Forma cylindracea J. Ag. 



Frond long and slender, of uniform diameter; usually floating 

 unattached. ~ 



J. Agardh, Till Alg. Syst., part 3, 1883, p. 131 ; Collins, Green Alg. 

 N. A., 1909, p. 205 ; Mar. Alg. Vancouver Is., 1913, p. 102 ; Saunders, 

 Alg. Harriman Exp., 1901, p. 411; Setchell and Gardner, Alg. N.W. 

 Amer., 1903, p. 212. 



