NOTES ON THE ANATOMY OF THE PUNCTATUS GALL 545 
the sections. Iron-alum haematoxylin was tried as a counter stain, 
but owing to the large amount of tannin in the galls, it was not a 
success. Where serial sections were necessary they were cut some- 
what thicker as a rule and mounted in glycerine. Such of these as 
were required for close study or photomicrographing were removed 
from the series, stained, and mounted separately. 
The author wishes to express his thanks to Professor M. T. Cook, 
of New Brunswick, New Jersey, for his kindness in identifying the 
material. He wishes also to thank Professor L. R. Jones, of the 
Department of Plant Pathology of the University of Wisconsin, for 
reading over the manuscript and offering certain suggestions regarding 
the same. 
Department of Botany, University of Wisconsin, 
Madison. 
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