104 Wisconsin Academy of Sciences, Arts, and Letters. 
in diameter with a narrow dark margin. In these spots the leaf 
parenchyma separates from the venules and probably falls away 
leaving the venular network. The zonate spots look much like 
the work of leaf miners, the dark line# suggesting burrows con¬ 
taining excreta. From the closely massed, erect, straight hyphae 
of the acervuli are abstricted hyaline filiform sporules 7-11 x 2//. 
Fungi Columbiani 1587 (on Populus tremuloides, New field, N. 
J. J. B. Ellis.) issued under the name Septoria musiva Pk. 
bears similar but somewhat larger spots (1-2 cm.) and sporules 
18-30x2-3//, uniseptate. I am considering the Wisconsin collection 
to be a microconidial state of this which I refer to Marssonina 
rhabdospora E. & E. 
Since this was written collections on Populus grandidentata 
have been made at Phlox and Neopit. The following notes were 
made from the latter: Spots circular, alutaceous shading out¬ 
ward into reddish brown and with a darker margin, the upper 
surface darker than the lower, 1-4 mm. in diameter, sometimes 
confluent; acervuli hypophyllous, usually few; sporules gener¬ 
ally straight, uniseptate, 18-33 x 2-3//. In the Phlox collection 
the spots are more numerous, rather more angular and more 
frequently confluent. 
Cylindrosporium vermiforme n. sp. Spots amphigenous, sub- 
circular to irregular, immarginate, brown, 5-15 mm. in diam¬ 
eter ; acervuli epiphyllous, scattered, subcuticular, flat, 40-60// in 
diameter; sporules, hyaline, vermiform, curved, sigmoid or 
flexuose, pluriseptate, 150-250x4-5//. On leaves of Alnus in- 
cana Devils Lake, Wisconsin. The sporules suggest eel worms 
in appearance. Specimens in the herbarium of the Uni¬ 
versity of Wisconsin collected at Devils Lake, August 15th, 
1906, by R. A. Harper show many of the sporules pro¬ 
vided with a rostrum, 10-42x1-1%//, at the apex. A collec¬ 
tion made in August, 1913, does not show the “ rostrum ’ 9 
but one made September 1, 1913, showed some of the spor¬ 
ules so provided. Living sporules, germinating in water, in 
addition to the lateral germ tubes, put forth one from the apex 
so like the ‘ 1 rostrum’’ that I infer that the beak is a germ 
tube put forth while the sporule is still in situ. Some spor¬ 
ules bearing a beak put forth in water a second tube alongside 
the rostrum and similar to it. Because of the large, erumpent, 
fasciculate sporules this might be referred to Hyphales. 
