1922] Setchell,—Cape Cod and the Marine Flora 7 
sandy and there is a general lack of the bold cliffs so characteristic of 
the northern shores of New England. If the 37 seemingly southern 
species are subtracted from the northern list, there remain 99 seemingly 
true northern species in it. 
In a similar way, careful consideration of the list of species yields a 
surprise by showing that 30 of the 113 species credited only to the 
south are found solely in localities of colder waters or appear or fruit 
only in the colder seasons. "This leaves 83 species to be regarded as 
normally southern. The details of the various segregations are given 
on the accompanying table which shows that 261 species, etc., may be 
regarded as belonging to the colder waters and 278 to the warmer 
waters, while 12 are to be placed in the doubtful column for the present 
at least. 
TABULATION OF SPECIES, VARIETIES, ForMs, ETC., OF MARINE 
ALGAE OF THE NEw ENGLAND Coast. 
N. of Cape Cod— Total Normally N. Normally S. Uncertain. 
Myxophyceae. 26 1 22 
Chlorophyceae. 29 17 12 
Melanophyceae. 40 37 3 
Rhodophyceae. 41 41 0 
Total. 136 99 37 
S. of Cape Cod— 
Myxophyceae. 18 1 17 
Chlorophyceae. 19 3 16 
Melanophyceae. 37 17 20 
Rhodophyceae. 39 9 30 
Total. 113 30 83 
N. and S. of Cape Cod— 
Myxophyceae.— 56 8 47 1 
Chlorophyceae. 68 22 44 2 
Melanophyceae. 13 48 ET 8 
Rhodophyceae. 105 54 50 1 
Total. 302 132 158 12 
Final Total. 551 261 278 12 
These figures, and other deductions which may be drawn from the 
table, show that Cape Cod does not appear to be so distinctly a divid- 
ing line as might have been supposed from the statements of the 
various authors, yet the general character, or appearance of the flora, 
especially as seen in the litoral belt, is very different north of Cape Cod 
