130 
has in return received Aphantostephus Arizonicus and Schkuhria Hop- 
kirkia. But most marked of all is the interchange of species along 
the line of the forest-belt. The resemblance between the flora of the 
Mogollones of South-western New Mexico, where the summer of 
1881 was chiefly passed, and that of the San Francisco and Mogol- 
lones of Arizona, where I staid in 1883, was very striking. Among 
the most conspicuous species in the vicinity of Clairmont, N. M., 
were Pentstemon linarioides^ Actinella Rushyi^ Hymenopappus Mexi- 
canus and Aster canescens^ with Helenium Hoopesii at a higher 
altitude. About Flagstaff, A, T., the same species abounded, im- 
parting a striking similarity to the landscape. Senecio Rusbyi was 
also here rediscovered and is probably to be found all the way down 
the highland to the New Mexican Mogollones. Cupressus Arizonica 
also follows the western side of this highland to Southern Arizona, 
but has not yet appeared from New Mexico. It may be added that 
those very interesting Mogollon Mountains of New Mexico are also 
very intimately connected south-westward with the mountains of 
Southern Arizona,, from which source they have received Galium 
Rothrockii, Sievia PlummercB, Primula Rusbyi, Brickellia floribunda 
and B. oliganthes. 
H. H- RusBY. 
Notes on New England Marine Algae, IV The following species 
have not before been reported from New England, and all with the 
exception of Ulva marginata, found by Prof. Farlow in algae from 
Salt Lake, Utah, are, as far as I know, new to the United States. 
Microchccte grisea, Thuret, Notes Algologiques, Plate xxx. On an 
old pecten shell at West Falmouth, Mass., in company with Calothrix 
Crustacea, Thuret. Resembling a small Calothrix, from which it 
differs in having no terminal hair, the trichome ending in a rounded 
cell instead of a point; known heretofore only on the coast of France. 
I am indebted to Dr. E. Bornet for the identification of this plant. 
Nodularia litorea (Kiitz.), Thuret. A few filaments among 
Lyngbyce, UIvcb, Calothrix, etc., in marshes at Hampton, N. H., in 
company with N. Harveyana, Thuret; the filaments are about twice 
the diameter of those of the latter species. Figured in Notes Algolo- 
giques, Plate xxix. 
Mhizoclonitim [Linum), Thuret. I have found at Kennebunkport, 
Maine, Hampton, N. H., and Nahant, Mass., a plant which agrees 
with authentic specimens of this species from Cherbourg, France. 
The filaments are from .10 to .12 """■ in diameter, and often much 
curled and twisted. It seems quite distinct from the Chcetoinorpha 
Linum of Farlow's Manual, which is about twice this diameter, and 
resembles rather Rhizoclonium tortuosum, which, however, is only half 
its size. 
ChcEtophora maritima, Kjellman, Spetsbergens Thallophyter, 
Plate v.,_ Figs. 15 and 16. At Kennebunkport, Maine, I found in an 
upper tide-pool, growing in a dense mass of Calothrix scopuloniw, 
Ag., Oscillarice, etc., a few filaments agreeing with Kjellman s 
description and plate. They did not, however, form a definite thal- 
lus, and if they belong to this species are probably a reduced form^ 
