46 FISH-CULTURAL ASSOCIATION. 
No form of apparatus heretofore devised has been satisfactorily 
operated to the accomplishment of this purpose. The experi- 
ments made during the summer of 1882 in the Chesapeake Bay, 
with the eggs of the Spanish mackerel, led to the hope that the 
hatching jar, fitted up as a receiver, may be with equal advan- 
tage employed in hatching this class of eggs. . The number of 
eggs obtainable was not enough to give results sufficiently de- 
cisive to establish this assertion. But these eggs, being sub- 
jected under the conditions presented in the receiving jar, to a 
current of salt water, being confined so as to prevent escape, 
and this confinement effected without the use of appliances that 
would injure the delicate membrane of the shell, there seems 
to be no reason why we may not use the jar as successfully 
with this class of eggs as with those of the whitefish and the 
shad. 
UniTED STATES FisH CommMISSION, 
Washington, D. C., April 6th, 1883. 
TRANSPORTATION’ @F CRUSTACEANS 
BY FRED MATHER. 
Of late years those who have stocked trout ponds and streams 
have realized the necessity of furnishing their fish with a perma- 
nent diet of natural food in the shape of crustacean life. A few 
years ago, Mr. James Annin read a valuable paper on this sub- 
ject before this Association, and it awakened much interest in 
the subject. Since that time, Mr. Annin has sent out many thou- 
sands of the so-called “fresh-water shrimp ” from his Caledonia 
ponds. Such life has usually been sent in cans of water and 
plants, I believe, and is therefore somewhat bulky, and the ex- 
press charges are an item in the cost. This winter I have 
received at the Cold Spring Hatchery many thousands of white- 
fish and trout eggs from Mr. Frank N. Clark, of Northville, 
