8 JOURNAL OF THE [January, 



Movement, illustrated by drawings on the black-board. This 

 address is published in full in the present numberof this Journal. 



OBJECTS EXHIBITED. 



The objects exhibited were : 



1. Vanessa; sections through the head : by L. Riederer. 



2. Arion ; sections through the eye : by L. Riederer. 



3. Larva of Lace-wing Fly : by F. W. Leggett. 



4. Head and Jaws of Lace-wing Fly : by F. W. Leggett. 



5. Arachnoidiscus Ehr., plated with gold ; mounted by A. Y. 

 Moore : by C. S. Shultz. 



6. Arranged Diatoms : by C. S. Shultz. 



The Chairman announced a course of Lectures to be given at 

 Columbia College, to which the Members of the Society were 

 invited. 



Meeting of February 4Th, 1887. 



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

 Seventeen persons present. 



Mr. Arthur H. Sleigh was elected a Resident Member of the 

 Society. 



OBJECTS exhibited. 



1. Cray-fish {Asiacus fluviatilis) ; sections through the organs: 

 by L. Riederer. 



Of these sections, the muscles were mounted in glycerine, 

 and the remainder in balsam, showing vas deferens with 

 ciliated cells. Also the sexual organs, showing sperma- 

 tozoa. Mr. Riederer explained at length his methods of section- 

 cutting and staining. 



2. Closteria ; Epistylis, Cephalosiphora and Limnias : by W. G. 

 De Witt. 



3. Brucine ; by polarized light : by M. M. Le Brun. 



4. Section of Granite ; by polarized light : by T. B. Briggs. 

 Messrs. Hyatt and Briggs explained their methods of cutting 



sections of minerals. 



The President expressed his thanks for his reelection to office, 

 and urged upon the members the need of greater efforts during 

 the current year in the matter of exhibition of objects. 



