rSgo.] NEW-YORK MICROSCOPICAL SOCIETY. 9 



PROCEEDINGS. 

 Meeting of October 4th, 1889. 



The President, Mr. Charles F. Cox, in the chair. 



Thirty persons present. 



The Recording Secretary read a Paper, presented by Mr. P. 

 H. Dudley, and entitled " Note on Calotermes marginipennis, 

 Latr." This Paper is published in the Journal, Vol. V., p. 

 III. 



Mr. Stephen Helm, of No. 417 Putnam Avenue, Brooklyn, 

 N. Y., read a Paper, entitled, " Note on the binary subdivision 

 of Micrasterias denticulata (Breb.), Ralfs," illustrated by black- 

 board sketches and an exhibit, as announced below^ This 

 Paper is published in the Journal, Vol V., p. 93. 



objects exhibited. 



1. Spores of the Fungus, Ustilago iitriculosa, Tul., on Poly- 

 gonum Pennsylvanicuin, L. : by J. L. Zabriskie. 



2. Spores of the Fungus, Ustilago Austro- Americana, Speg., 

 on Polygonum Pennsylvanicum, L. : by J. L. Zabriskie. 



3. Insect eggs, arranged : by Charles S. Shultz. 



4. Transverse section of ovary of the Poppy : by Charles 

 S. Shultz. 



5. Volvox stellatus, Wolle : by William G. De Witt. 



6. Two forms of the same, with changed color : by William 

 G. De Witt. 



7. Foot of the Beetle, Chrysochus auratus : by F. W. Leggett. 



8. Two hairs from the foot of the same : by F. W. Leggett. 



9. Micrasterias denticulata (Breb.), Ralfs: by Stephen Helm. 

 ID. Plumatella repens : by Stephen Helm. 



II. Lophopos c/ystallinus : by Stephen Helm. 

 Mr. Zabriskie stated concerning his exhibits, that these fungi 

 infest the same species of plant. Polygonum Pennsylvanicum. 

 Ustilago utriculosa, as its specific name indicates, causes the 

 fruit of the host to enlarge like a bladder — externally smooth 

 and of a leaden hue, internally a mass of dark purple spores. 



