59 
it is not possible in most all of the egg development in our 
hatcheries that the membrane (I think you call it the mem- 
brane—I am not familiar with the scientific name), with 
our trout, for instance, where we are obliged to move the 
trout eggs, or agitate them at an early period after the 
egos are taken, is not broken in being moved about, as 
well as pike eggs ? 
Pror. REIGHARD—I think very likely. I do not know 
of any eggs of the commercial fish handled that have not 
a structure practically the same as this. In all of them 
there is this thin membrane and yolk, and under that and 
practically independent of the membrane is a substance of 
a doughy consistency, and the rupture of the sac allows 
that to escape. 
Mr. CLarkK—A year ago last winter we took and shipped 
egos from a gravel box, probably 20,000 brook trout eggs, 
the second day after they were taken from the fish, and 
another box of the same size, taken at the same time, was 
left undisturbed. Of the first box we didn’t hatch 30 per 
cent. of the eggs, while of the other we hatched 94 per 
cent. They were drawn with a syphon. 
Mr. Pace—Might I ask what kind of a box it is you 
keep eggs in? 
Mr. CrarK—A shad box. 
Mr. Pace—A Seth Green shad box ? 
Mr. CLrark—Yes, with wire on the inside of the box, so 
the eggs can be turned over and the screen cleaned. 
Mr. MarHerR—I would ask the Professor if he has ever 
seen any smelt eggs? They seem to throw out a little 
footstool. 
Pror. RetgHarD—I have not. That is the case with 
some eggs; there is a hair-like projection upon them. I 
am not familiar with those eggs. 
Mr. MatrHEeR—There is a lot of pedicle-like hairs thrown 
out from smelt eggs that occasions us a great deal of trou- 
ble in smelt hatching. 

