LEVINE: SPORADIC APPEARANCE OF NON-EDIBLE MUSHROOMS 63 
compost after the beds were made and several species of Poria 
were found on the wooden framework in some of the more moist 
houses, but I shall not report on them at this time. 
DEPARTMENT OF BOTANY, 
COLUMBIA UNIVERSITY. 
Description of plates 3-5. 
In PLATEs 3 and 5 the natural sizes of the plants are represented; in PLATE 4 the 
figures are slightly reduced. 
PLATE 3 
Fics. 1-4. Young stages in the development of Panaeolus venenosus Murrill. 
Fics. 5-8. Mature stages of Panaeolus veneno 
Fics. 9-11. Stages in the development of een retirugis Fr. 
PLATE 4 
Fic. 12. Longitudinal section of a mature carpophore of Panaeolus venenosus 
with a short stipe. 
Fic. I Young carpophore of Panaeolus venenosus with a short s tipe. 
Fic. 14. The under surface of the pileus of Panaeolus venenosus with a short 
stipe. 
Fics. 15-17. Clusters of Clitocybe dealbata Sow., showing the upper and lower 
surfaces of the pilei 
Fics. 18-20. iauive stages in the development of Peziza domiciliana Cooke. 
PLATE 5 
Fics. 21-23. Diff t stag fat 4 hat t cl ly resembles Tricholoma 
melaleucum Quél. 

