112 JOURNAL OF THE [july, 



Meeting of June i8th, 1886. 



The President, the Rev. J. L. Zabriskie, in the chair. 

 Thirty-two persons present. 



OBJECTS exhibited. 



1. Tetraspora cylindrica, two slides : by P. H. Dudley. 



2. Section of Quercus alba : by P. H. Dudley. 



3. Photo-micrographs of transverse, tangential, and radial sec- 

 tions of Quercus alba : by P. H. Dudley. 



4. Pond-life : by C. S. Shultz. 



5. Crystallized Gold from Ontario Mine, Colorado : by G. F. 



KUNZ. 



6. Markings on Hydrolites from Thomaston, Georgia : by G. 

 F. KuNZ. 



7. Bacteria lactis from Human Milk, and Culture Tube of 

 same : by W, H. Bates, M. D. 



8. Five species of Triceratitwi from Barbadoes material ; 

 mounted by Prof. Ed. Thum, Leipzig : by E. A. Schultze. 



9. Fore-wing of the bombycid moth Utetheisa bella, L. : by 

 B. Braman. 



'" -10. Anthers of the Deerberry {Vaccinium stamineum, L.) : by 

 J. L. Zabriskie. 



II. Hydrodictyon utriculatum : by W. G. De Witt. 



structure of quercus alba. 



Mr. Dudley read a paper on the " Structure of Quercus Alba,'' 

 illustrated by prepared sections and photo-micrographs. 



triceratium. 



Mr. E. A, Schultze exhibited five slides prepared by Prof. 

 Thum, of Leipzig, showing as many species of Triceratium ob- 

 tained from Barbadoes material, some of which he had been 

 unable to identify. 



[Plates containing photo-micrographs of the species exhibited, 

 with a description of the same, will be found in this number of 

 the Journal,] 



