vol. i] Setckell-Gardner. — Algce of Northwestern America. 231 



Vaucheria terrestris Lyngbye. 



In a ditch. Near the University of Washington, Seattle, 

 Wash., X.L.G., No. 392! 



Family CODIACE.E. 



Codium adhaerens (Cabr.) Agardh. 



Dredged in a depth of 15 meters, Kadiak Island, Alaska, 

 Saunders (1901, p. 416); very sparingly on rocks in the npper 

 snblitoral zone, west shore of Whidbey Island, Wash., N.L.G., 

 No. 265! 



Codium Bitteri Setchell and Gardner sp. no v. Plate 17. 



Frond globose to piriform, 3 cm. high, attached by a distinct 

 stipe-like base, solid, the center composed of a felt-like mass of 

 fine fibres. Outer filaments or utricles., free, blunt, 150-400 /«• in 

 diameter, the older ones usually swollen in the middle, and having 

 the membrane at the tip somewhat thickened at the central point 

 projecting inwards. Zoosporangia unknown. 



The type of the species proposed here is a single specimen 

 collected at Berg Bay, in two or three fathoms of water, by 

 Professor YV. E. Ritter, of the University of California, while on 

 the Harriman Expedition to Alaska. A second specimen, agree- 

 ing apparently in habit and structure, but not in the description 

 of its habit, is No. 370 of Miss Tilden's American Alga?, collected 

 by her at Port Renfrew, Vancouver Island, B. C, and distributed 

 under the name of Codium adhcerens. 



Codium Eitteri approaches both C. Bursa (Turner) Agardh and 

 C. mamillosum Haiwey, but is distinct from both. From the 

 foi-mer it differs in being solid and in having a more distinct 

 stipitaJ portion, while from the latter it differs in having a more 

 distinct stipital portion and the smallness of the utricles as well 

 as the shape of the utricles. The utricles, in a specimen of 

 ilme. Weber van Bosse, kindly loaned by F. S. Collins, are 

 balloon-shaped, and measure from 1 to 2 mm. in diameter. From 

 C. adherens, C. Eitteri is amply distinct, since it has not the 

 firm jelly uniting the utricles, which is so characteristic of that 

 species. It is to be noted that G. mamillosum is credited to 



