vol.1] Setchell— Gardner. — Algce of Northwestern America. 245 



Family STRIARIACE.E . 



PhlcEOspora tortilis (Turner) Areschoug. 



On stones, in quiet and somewhat brackish water. Golofnin 

 Bay, Alaska, B. C. McGregor, Nos. 5668!, 5676!; lagoon near 

 Summer Bay. Unalaska, Alaska, W.A.8. and A.A.L., No. 4069! , 

 iu Collins. Holden aud Setchell, No. 987!, under Sticiyosiphon 

 tortilis. 



No. 5676 has excellent sporangia, the other numbers are 

 largely sterile. 



Phlceospora subarticulata Areschoug. 



Port Clarence, Alaska, Kjelhnan (1889, p. 50). 



By some authors, this species is not considered distinct from 

 the preceding. 



Striaria attenuata (Agardh) Greville. 



Orcas Island. Wash., and Vancouver, B. C, Harvey (1862, 

 p. 167). 



The reference quoted above is the only reason known to us 

 for including this species in our account. 



Family DESMARESTIACE^E . 



Desmarestia viridis (Mueller) Lamouroux. 



On stones in the upper sublitoral region. Captains Bay, 

 Unalaska, Alaska, A.A.L., No. 5015!; Prince William Sound 

 and Glacier Bay, Alaska, Saunders (1901, p. 422); Esquimalt, 

 B. C. Harvey (1862, p. 164). 



The occurrence of this species in our territory is not altogether 

 satisfactorily known to us. No. 5015 seems to be this species 

 rather than D. aouleata f. media (Agardh) J. Agardh, which it 

 resembles in its older states. This resemblance and lack of 

 careful study of the two forms, makes it uncertain at times, to 

 which species the references refer. Saunders says that it is not 

 uncommon, but less abundant than D. acnleata. I), viridis f. 

 major P. & R. (1840, p. 13) seems from the description to be a 

 form of the following species. It was collected at Unalaska. 



BOT.-17 



