1887. | BOTANICAL GAZETTE. 69 
Ouvirandra fenestralis. 
I 
tioned that it is very difficult to keep Ouvirandra fenestralis free from 
a 
some specimens of Planorbis corneus into the tank where that plant was 
growing. This snail cleans Ouvirandra thoroughly without injuring it. 
do not know whether Planorbis corneus occurs in America, but an 
other species will probably do quite as well. English cultivators recom- 
mend keeping Ouvirandra in the shade to prevent the luxuriant growt 
of alge on it. (cf. Regel’s Gartenflora, 1886, pp 308 and 647). 
Botanic Garden, Oxford, England. Dr. 8. SCHONLAND. 
Rendering herbarium specimens pliable. 
made up as follows: Alcohol, 26 fi. 02; corrosive sublimate, 1 oz. mix 
and dissolve, then add 6 fl.oz. glycerine. Plants poisoned by this solution 
are not only well preserved, but are also much less liable to be damage 
by freqnent handling. ¥, T. MAN, 
Sharon, Pa. 
German and American Botanists. 
chemical faculty. But all this will come also in America in due time 
Giltingen, Germany, Winturor E. Stone, 
