A Moncgmph of the Genus Alarta. 97 



Setchell and Gardner unhesitatingly announced the identity of 

 both species. But what these two writers meant by A. prœlonga 

 Kjellm. is, as may be understood from the remark alluded to 

 above, nothing but A. marginata P. et K. The figures sketched 

 by Saunders in Minn. Bot. Studies, 1. c, Plate 33 show small 

 speairaens of the present species though not typical. It appears 

 rather curious to me how he came to describe his plant as new, 

 considering that he had already reported A. cordafa Tilden with 

 illustration from Yaktat Bay. In Mar. Alg. of Vancouver Island, 

 p. 110, Collins follows Setchell's amendment of A. marginata in 

 bringing A. curtipes Saunders under it. But that he mentioned 

 A. nana Schrad. in its varietal rank shows his unfamiliar ity with 

 both species. 



The specimen distributed by Miss Tilden as No. 521 American 

 Algae under A. curtipes, in the copy I have seen, agrees satisfac- 

 torily with A. valida Setch. et Kjellm. And, No. 241 of the 

 same exsiccata under A. cor data Tilden can safely be identified 

 with A. marginata P. et E. 



Locality. St. Paul Island (Townsend and Setchell) ; Yaktat 

 Bay (Saunders) ; Kadiak Island (Setchell) ; Unalaska (Postels 

 and Ruprecht) ; Juan de Fuca Strait (Tilden) ; California (Berg- 

 gren and J. Agardh, in Herb. J. Ag. under A. striata) ; Central 

 California (Saunders). 



Alaria Pylaii Grev. 



(Plate Vn ; Plate YIH, figs. 1-2.) 



Alg. Brii. Syii., p. XXXIX.— Harvey : Alg. N.-W. Coast of N. 

 Anicr., p. 165. — J. Ag. : Grönland Lam. oeli Fiic, p. 24. — Id. : 

 Si^ec, I, p. 143.— Setch. et Gardn. : Alg. N. W. Amer., p. 272. 



