[Vor. 1 
196 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
two-thirds glycerin and one-third water—at the edge of the 
cover glass and allowing the glycerin to run under the latter as 
the water evaporates. When concentration of the glycerin is 
adequate, the excess should be wiped away with moist filter 
paper and the resulting smear removed to the very edge of the 
cover glass with a soft cloth moistened with 95 per cent alcohol. 
The preparations may then be sealed from the atmosphere by 
painting a ring of microscopical cement about the edge of the 
cover glass. At least two coats should be used for this ring, a 
light and very narrow one, and, after this dries, a very heavy, 
broad one. I have used Bell’s Microscopical Cement, made in 
London, and Brunswick Black Cement. A variable percentage 
of the rings crack in the course of a few years and allow the 
glycerin to escape from under the cover glass, but the sections in 
such preparations can be remounted. Dr. Thaxter has very 
recently informed me that he has been using King’s Transparent 
White Cement and King’s Amber Cement for fifteen years and 
that none of the rings made with these cements have cracked. 
By the use of circular cover glasses rather than square ones, 
а microscopist’s turn table may be used, thereby materially 
lessening the labor of preparing the rings. 
SYSTEMATIC ACCOUNT 
THELEPHORACEAE 
Thelephoree Persoon, Myc. Eur. т: 109. 1822; Fries, 
Hym. Eur. 629. 1872; Saccardo, Syll. Fung. 6:513. 1888. 
Hymenomycetes with the hymenium inferior or amphigenous 
(on the lower surface or surrounding the fructification), cori- 
aceous or waxy, even, rarely ribbed or papillate. 
Through several of the genera the Thelephoracee connect 
closely with all the other families of the Hymenomycetes. 
Hypochnus approaches Grandinia of the Hydnacee in the gran- 
ular hymenial surface of many of the species, but can be sepa- 
rated from this hydnaceous genus by the spore characters. 
Lachnocladium, with coriaceous structure, hairy stem, and 
colorless spores, is an intermediate genus between Clavaria, of 
the Clavariacee, and Thelephora but can be separated from the 
latter by the spore: characters. Craterellus connects with 
