1885.] NEW-YORK MICROSCOPICAL SOCIETY. 17 



PROCEEDINGS OF THE SOCIETY. 



Meeting of October 3D, 1884. 



The President, Mr. C. Van Brunt, in the chair. 



Twenty-two persons present. 



The Corresponding Secretary read two letters, — one from the 

 Managers of the American Exhibition to be held at London 

 next year, inviting the Society's cooperation ; the other from the 

 Smithsonian Institution, asking for portraits of prominent scien- 

 tific men. 



The following objects were exhibited : — 



Mineral Wool : by G. F. Kunz. 



Furnace Slag : by G. F. Kunz. 



Oxalurate of Ammonia (Arborescent Crystals) : by Edward 

 G. Day. 



A Moller Slide illustrating thirty-six species of Pleurosignia : 

 by W. G. De Witt. 



Pond-life, from Staten Island : by E. A. Schultze. 



Pond-life, from New Jersey : by A. D. Balen. 



1. Melicerta ringens. 



2. Plumatella repens. 



Mr. Balen said that he had expected to exhibit Stephana ceros 

 Eichornii. He had a few days before collected some from a 

 pond in which he had sought for it several years without success. 



Mr. Day, who exhibited the slide of Arborescent Crystals of 

 the Oxalurate of Ammonia, spoke of the uncertainties of success 

 attending efforts to produce in all cases a definite form of crys- 

 tal. 



Mr. Day showed a hair-worm of a length of twenty-one and 

 a half inches, which he had taken from a grasshopper that was 

 not more than one and a half inches long. 



Mr. E. B. Grove said that he had discovered in the large gray 

 grasshopper the same parasite that Mr. Day had found, but of a 

 less length in proportion to the size of the host. 



Mr. Day stated that he had received from Mr. P. L. Hatch a 

 letter informing him of his finding tape-worms in hen's eggs. 



