Geo. K. Sutherland. 
3 $ 
monotypic genus Blodgettia, 1 recorded by Harvey, and placed by 
him among the Valoniaceae under the name Blodgettia confervoides. 
Later botanists, while somewhat puzzled at the characters of the 
new alga which, if correctly described and diagnosed, justified the 
formation of a new order for itself, failed to grasp its true nature. 
Thus Fal low included it in his “ List of Marine Algae of the United 
States,” 2 with the reservation that the genus was worthy of further 
careful study. Bornet, who had also examined material, noted the 
incongruity of the conidia and explained these as separate parasitic 
algae, at the same time suggesting that the mycelium was a form of 
Cladophora nearly related to Cladophora prolifera. It is to Wright 
that we owe the final determination of the parasite, to which his 
attention had been attracted while examining herbarium material 
of Cladophora ccespitosa from Bermuda. He was dissatisfied with 
the original description and in 1876 showed a specimen to the 
Dublin Microscopical Society. After obtaining fresh material from 
Parlow, he became convinced of its fungoid nature and placed it 
among the Dematiaceae as Blodgettia Borneti .' This species is 
1 Trans. Irish Acad., Vol. 28, p. 25, 1881. 
found in the filaments of Cladophora ccespitosa on the coasts of 
France and North America. 
The first record of the occurrence in Britain of any marine 
Imperfects appears to belong to the early part of 1888, when Cooke 
and Massee gave a note on Cladosporium algarund found by a 
correspondent on washed up fronds of Laminaria flexicaulis. A 
later examination of what they regarded as more mature material 
led them to transfer this form to the genus Heterosporium . 4 At 
the same time they described a species of Phoma also occurring on 
Laminaria. To both of these reference will be made in the follow¬ 
ing notes. 
In 1894, Oudemans 5 described a species of Septoria occurring 
in thethallusof Dictyota obtusangula in the Celebes. For the following 
twenty years no further species seem to have been recorded. 
During the past two years an extensive examination of marine 
algae, conducted primarily with a view to investigating the extent 
of marine Pyrenomycetes, has revealed the presence of numerous 
Imperfects, and confirmed the opinion that these play an important 
1 Smithsonian Contributions to Knowledge, 1858. 
2 Proc. Anier. Ac. Arts & Sci., Vol. 10, 1875. 
* Grevillea, Vol. 16, p. 80. 
4 Grevillea, Vol. 18, p. 74. 
6 Verslag. d. Kon. Akad. Wetensch., Amsterdam, Vol. 3, 1894, p. 54. 
