1887] Zoology. 773 
When the liquid is cold add 50 grains of carbolic acid. Let 
the liquid stand five or six days, and then filter. It is claimed 
that by means of this fluid the colors of larve can be preserved 
perfectly, even when exposed to a strong light. 
ZOOLOGY. 
Hydra inside out; ‘a Correction.—Will you allow 
me to correct a slight mistake that has crept into the pages of 
the AMERICAN NATURALIST? On page 387 of the April number 
it is stated that I have succeeded in turning Hydra inside out. 
The credit of having accomplished the feat should be given to 
Mr. C. Ishikawa and Mr. M. Kikuchi, both my assistants at the 
time. They devised simple but ingenious instruments for the 
_ purpose, and made the task of turning Hydra inside out a com- 
_ ‘paratively easy one, as I can testify from personal trial. Mr. 
Ishikawa made at the time many observations on the behavior 
of Hydra thus turned inside out. So far as I remember, Hydra, 
_ under these circumstances, generally quickly gained the right 
side out again, and if forcibly prevented from doing so by having 
‘ a bristle put through its body, it still made frantic and almost 
laughable efforts to right itself, No definite results were reached, 
so far as I can recollect, in regard to the change of functions in 
| the layers of the body,—at any rate something interrupted Mr. 
_ Ashikawa’s observations before any definite conclusions were ob- 
tamed, and that is the reason that nothing has been published 
= now. I hope that Mr. Ishikawa will take up the investiga- 
‘on again some time, and throw more light upon this interesting 
vas Mitsikuri, Imperial University, Tokio, Fapan, June 
of June 20, 1887, when returning from placing 
oe engodes females where they might attract the males, I 
vs the path before me a small phosphorescent light. As I 
ae Remarkable Case of Phosphorescence in an Harth-Worm. ' 
: Eri the night 
