Howe: Phycological studies 495 



British Fuci, published in the same volume of the Transactions, 

 it would seem that these authors were not very familiar personally 

 with " Fucustomentosus" and, furthermore, that they considered it 

 "very doubtful whether it may not belong to the genus Ulva." 

 Agardh doubtless thought that he was improving on the specific 

 name in substituting elongatum for the inapt and more or less 

 misleading decor ticatum, but under the prevalent rules of pro- 

 cedure of the present day, there seems to be no sufficient reason 

 for ignoring what is apparently the oldest tenable specific name. 

 Harvey and some other writers have doubted the specific 

 distinctness of what has been known as Codium elongatum, con- 

 sidering it a form of C. torn ento sum. But in its usual form it is so 

 different from Codium tomentosum, and ambiguous conditions are 

 so few that it seems worth while, for the present at least, to 

 maintain its specific rank. Its elongate and sparingly branched 

 habit, its more or less pronounced flattened expansions below the 

 dichotomies, and its larger utricles, are commonly quite sufficient 

 to distinguish it from C. tomentosum. In this connection, however, 

 it is of interest to note that the apparently original specimens of 

 C. elongatum Ag., preserved in the Agardh herbarium, do not 

 show particularly large utricles (they are 110-225/i in greatest 

 width), and the dilations under the dichotomies are not remark- 

 ably pronounced, reaching a width of scarcely 2 cm. In speci- 

 mens of our collecting in Bermuda the dilations sometimes have 

 a width of 10 cm. or more. 



PHAEOPHYCEAE 



Colpomenia sinuosa f. tuberculata (Saunders) Setch. & Gard. 



Univ. California Stud. Bot. 1: 242. 1903 

 Colpomenia tuberculata Saunders, Proc. California Acad. Sci. III. 



1: 164. pl.32.f. 1-3. 1898. 



La Paz, collector unknown. The specimens were sent to Dr. 

 C. L. Anderson from the California Academy of Sciences, with 

 the information that they had been used for packing. The brown, 

 coriaceous thallus forms mats 10-20 cm. wide. Some parts of 

 the thallus are nearly smooth, some parts bear wartlike excres- 

 cences, and others are drawn up into subconical, bullate, or 

 finger-shaped processes sometimes 1-2 cm. long. 



