™~ 
416 The Botanical Gazette. — [0c 
Doassansia ranunculina, n. sp.—Spots light brown, 2-4™ in diam- 
eter, papillate. Sori ag regated or eager: usually spherical, 100- 
e parench or the | 
the 
epidermis and the fibro-vascular ‘bundles. Spores crowded, filling the 
sorus, spherical or polygonal, 6-10 in diameter. Cortex of one layer 
of cells which are more or less quadrangular. in section, pee 
Spores germinating in position. Promycelium 3-4 in : 
vacuolate. Primary sporidia 6-8 in a whorl on the end of ce promy 
celium, fusiform, vacuolate, 12-20X2-2.5M. Conjugation by mean 
a large apical tube both in position and after becoming free. 
ment 60-90/ long is then formed from which the secondary 
are abstricted in basipetal. succession. Secondary sporidia 12-15X ; 
2.5-3. In material which had germinated and produced the fila- 
ments in the field the secondary sporidia conjugated by means of 
necting tubes. In many of the specimens collected germination ! 
occurred and the filaments protruded through the cleft cortex 
epidermis. ; 
In the leaves and occasionally the petioles of pee mit. 
Pursh, in swampy places which had become dry during the ’ 
Racine, Wisconsin. vs 
Material has been prepared for the distribution of these s 
Ellis and Everhart’s North American Fungi.—J. J- Davis, 
Wisconsin. 
Ruled slides.—For several years I have made much use of rtedsi 
with a stage microscope. It is so easy thus to measure bee | 
dissect, that I wonder they are not in more general use. ae 
are ruled in squares, 1o™ each way, in the middle of a sli 
ought to be three inches long, and wider than the ordin 
prevent getting mixed up with them. The ruling ought to 
enough so that water will not temporarily make it pes 
difficult to see the lines. Good ruled slides for the eget 
ought to be in the market at moderate prices.—W. J. 
tural College, Mich. 
