Vol. 49 No. 4 
BULLETIN 
OF THE 
TORREY BOTANICAL CLUB 
APRIL, 1922 
The phylogeny of the genus Brachiomonas 
Tracy E. HAZEN 
(WITH PLATES 3 AND 4 AND FIVE TEXT FIGURES) 
Brachiomonas, one of the oddest and most interesting genera 
of the Chlamydomonas group, has not until now been reported 
outside of western Europe. The genus was established by 
Bohlin (1) in 1898 with two species, differing in details of form, 
found in Sweden near Stockholm. The more slender species, 
B. gracilis, has not been reported elsewhere. The type species, 
B. submarina, had been collected about three years earlier by 
Lagerheim (6, p. 7) near Troms¢, Norway, and recorded as a 
nomen nudum which was taken up by Bohlin. A somewhat 
general distribution of this species on the Norwegian coast has 
been indicated by Wille (15) and Printz (8, p. 21). It appears 
that Dangeard (3, p. 74) had observed the same form about 
ten years earlier than Bohlin, at Luc-sur-Mer, France, but had 
postponed publishing it until gametes could be found. Chodat 
(2, p. 143, f. 66) has recorded the species from Ajaccio, Corsica, 
showing that it is not exclusively of northern habitat. 
West (12) in 1908 reported a form collected in brackish 
marshes at Sheerness, England, near the mouth of the Thames, 
which he rather hesitatingly referred to B. submarina, since it 
seemed to be somewhat intermediate between Bohlin’s two 
species. In July, 1920, at Cullercoats, near Newcastle-upon- 
Tyne, and in August at Plymouth, England, I found abundant 
material in small rock pools, showing forms similar to those des- 
cribed by West, together with specimens agreeing more with 
Bohlin’s type. Earlier in the same season (June 25) I had 
found on the coast of Norway at Valdersund, near Trondhjem, 
[The BuLtetin for March (49: 51-74. pl. 2) was issued April 12, 1922.] 
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