99 



Gymnogongrus Torreyi (Ag.) J. Ag. This is probably only a 

 peculiar flattened condition of Ahnfeltia plicata, as has been 

 pointed out by Professor Setchell.* The flattening, however, as 

 in Agardh's type specimens, is often pronounced in the upper 

 parts of the plant, the longer transverse axis being sometimes 

 twice as long as the shorter. 



Ahnfeltia plicata (Huds.) Fr. 



Sterrocolax decipiens Schmitz. Abundant on " Gymnogongrus 

 Torreyi" which fact may be interpreted as strengthening the 

 idea that G. Torreyi is only a form of Ahnfeltia plicata. 



Cystoclonium purpurascens (Huds.) Kiitz. Apparently sterile. 



Rhodymenia palmata (L.) Grev. Large tetrasporic specimens 

 attached to Laminaria stalks. 



Polysiphonia elongata (Huds.) Harv. Apparently sterile. The 

 specimens are in part fibrillose and in part represent the coarse 

 denuded autumn and winter condition. Davis ascribes the 

 species to "summer," but Farlowf recognizes its perennial habit. 



Spermothamnium Turneri (Mert.) Aresch. Attached to the 

 base of Polysiphonia elongata. 



Callithamnion Baileyi Harv. With mature cystocarps. 



The following were collected on February 25. Mr. Latham 

 writes that the Chaetomorpha, the Sargassum, and the Champia 

 were taken by cutting a hole "through fifteen inches of ice on 

 the bay": 



Chaetomorpha Linum (Mull.) Kiitz. % 



Sphacelaria cirrhosa (Roth) Ag. Attached to Ascophyllum (?) 

 and forming tufts 0.5-1.5 cm. high. Davis refers this to the 

 summer species. 



Desmarestia aculeata (L.) Lamour. 



Sargassum Filipendula (Ag.) J. Ag. A plant nearly 5 dm. high, 



*Rhodora7: 136-138. 1905. 



t Mar. Alg. N. E. 172. 1881. 



%Ch. Linum has been referred to Ch. aerea (Dillw.) Kiitz. as a form by F. S. 

 Collins (Green Alg. N. Am. 325. 1909). The plant described by Dillwyn may 

 be the natural type of the species, but that described by Midler more than thirty 

 years earlier would appear to be the historical type, and, if one is to be considered 

 a form of the other, the rules of botanical nomenclature as now almost universally 

 interpreted and applied would seem to demand that Mr. Collins' procedure should 

 be reversed and that Ch. aerea should be regarded a form of Ch. Linum. 



