l888.] NEW-YORK MICROSCOPICAL SOCIETY. 155 



light would strike upon them at different angles. Allowing that 

 the animal has this power, the explanation is complete. 



Mr. Hyatt also stated that he kept the animal, which furnished 

 the specimen of cast skin exhibited, alive in a cage, and that it 

 gave no evidence of change of color corresponding to that of 

 the object upon which it might be resting ; but showed a red 

 color when displeased, and a green color'when pleased, as in the 

 act of receiving food. 



The Rev. K. F. Junor, called attention to a cuttle fish, in 

 which the change of color is caused by the transference of a 

 fluid, contained in the skin, from a lower to a more superficial 

 layer of pigment-cells, or 7'zV^ Tersa. 



Mr. L. Riederer also mentioned the frog, in whose skin a 

 change of color is occasioned by contraction of pigment-cells. 



Annual Reception of iSSS. 



The Tenth Annual Reception of the Society was held at 

 Lyric Hall, 723 Sixth avenue, on the evening of February 24th, 

 1888. 



The large hall was filled with an apparently interested and 

 gratified audience, and the occasion was enlivened by music, 

 furnished by an excellent orchestra. 



Fifty-two objects were displayed and explained by forty 

 exhibiting members. 



The objects exhibited were as follows : — 



1. Meteoric Diamonds : by George F. Kunz. 



2. Peridotitc, var. Kimberlite, Lewis, from Elliott Co., Ken- 

 tucky : by George F. Kunz. 



3. Peridotite, var. Kimberlite, from Kimberly, South Africa : 

 by George F. Kunz. * 



4. Utriculan'a neglecia, an insectivorous aquatic plant : by 

 George S. Woolman. 



5 and 6. Trichina spiralis : by L. Schoney. 



7. Seeds of Orthocarpus purpurascefis : by Edward G. Day. 



8. California Gold-Sand : by Edward G. Day. 



9. The Diamond Beetle, Entimus imperialis : by Mark H. 

 Eisner. 



10. Arranged Diatoms : by Mark H. Eisner. 

 II and 12. Cyclosis : by F. W. Devoe. 



