56 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
The Vendace (Coregonus albula). 
On April 12, 1888, 51,000 fish of this species, one month old, were planted in Heart 
Pond, Me., by Mr. Atkins. 
Yellow Perch (Perea flavescens). 
In April, 1889, the eggs of the yellow perch were successfully hatched by Mr. Worth 
at Central station. Adults from the Potomac River spawned naturally in the aquaria, 
and their eggs were placed in the universal hatching jars and developed almost with- 
out loss. The eggs were an oblong mass of fleecy texture, several inches long and 
heavier than water. The fry were very small; they were retained at the station in 
a small pond, and kept under observation. 
On February 7, 1890, Mr. S. G. Worth obtained 243 adult yellow perch from the 
Potomac River. These were kept in running water at Central station until they 
deposited and fertilized their eggs naturally. The eggs were hatched successfully, 
with very small loss, and 704,000 fry were liberated in the Potomac River, and 50,000 
in a private pond. 
Pike Perch (Stizostedion vitreum). 
The eggs of the pike perch, writes Mr. Douglass, of the Sandusky station, are about 
one-half as large as whitefish eggs. They are strongly adhesive, and great loss is 
sustained in separating them. The young begin to devour each other when only ten 
days old, and must therefore be liberated as soon as hatched. 
Sea Bass ( Serranus atrarius). 
From June 5 to 10 about 1,150,000 eggs were collected at Woods Holl, Mass.; of 
these, 1,025,000 were hatched and the fry planted between June 10 and 13, 1889. 
The collection of eggs for the Woods Holl station began May 23, 1890, and closed 
June 20. The number taken was upward of 4,250,000, of which 90 per cent were 
hatched in Chester jars and McDonald boxes. The shortest hatching period was 70 
hours, with an average temperature of 64° ; the longest period was 127 hours, when the 
temperature averaged 56°. The fish were liberated near the station. 
Black Bass (Mieropterus salmoides) . 
At Neosho, Mo., the black bass were expected to spawn in the ponds in the spring 
of 1890, but although they were tame and thrifty they deposited no eggs. In one pond 
they were attacked in the mouth by leeches and have not flourished. 
Sheepshead (Archosargus probatocephalus) . 
On March 19, 1889, Lieut. Robert Platt, II. S. N., found sheepshead spawning at 
Boca Grand Pass, Fla., and collected 3,400,000 eggs. He then went to San Carlos Bay, 
about 30 miles distant, and found the fish abundant there and in spawning condition. 
He obtained in all 23,400,000 eggs, from which 14,000,000 healthy fry were developed, 
and 2,500,000 eggs were retained in the jars to be transported North. Lieut. Platt 
describes the eggs as follows : 
The egg of the sheepshead is a floating one and transparent; very small, 50,000 to the fluid 
ounce. We placed in the hatching jars about 300,000; they came out in forty hours, and can he liber- 
ated when seventy-two or eighty hours old. The fry are very small, hut active and strong, and will 
stand considerable rough usage. We found that it was labor in vain to seine for spawning fish during 
the morning or ebb tide. The proper time is just before sundown, just as the .flood tide begins to 
