34 JOURNAL OF THE [January, 



prora was common in tide pools of Harlem River ; that Dr. 

 Van Heurck gives a figure of the diatom, and the locality 

 as "Harlem River, New York" ; that the diatoms of Honey 

 Meadow Brook arise in warm weather as a scum, consisting 

 quite purely of diatoms, one field, as then under the micro- 

 scope, showing fifty species of the following genera : Navicula^ 

 Cyclotella, Cymbella, Surirella, Gomphonetna, Cocconeis, Synedra, 

 Achnanthes, and Fragilaria ; and also that the " Silver Polish " 

 in question affords multitudes of diatoms, some of them very 

 fine test objects. 



Mr. Zabriskie explained his exhibit of fungus as follows : 

 This photograph is a dry-plate lantern slide, one of a set of 

 about one hundred made from negatives by Mr. Leffert Lef- 

 ferts, taken by him on a trip to Mexico in the fall of 1889. 

 These slides were neatly mounted with mat and cover, and 

 were securely bound with gummed strips around the edges. 

 They were at first frequently used in the lantern, but have been 

 left undisturbed for about one year and one-half, stored in a 

 velvet-lined box on the second floor of the maker's residence. 

 Having occasion to examine them recently, he observed on the 

 film of many of them white, radiating, dendroid patches, one- 

 half of an inch in diameter or less, like some form of crystal- 

 lization. 



On examination with the microscope it was at once seen that 

 each patch was a matured fungus, consisting of white hyphas, 

 radiating with more or less regularity from a centre, and fur- 

 nished with numerous branchings, gradually decreasing in size 

 to the attenuated tips. With a magnification of 250 diameters 

 numerous clusters of elliptical, light-brownish spores were 

 found, lying detached upon the film in the neighborhood of 

 the delicate extremities of the branches. 



This slide was submitted to Mr, J. B. Ellis, of Newfield, 

 N. J., and from his reply this is probably an undescribed spe- 

 cies of fungus. He says it is near Botrytis reptans. 



Meeting of December 15TH, 1893. 



The President, Mr. Charles S. Shultz, in the chair. 

 Twenty-three persons present. 



