194 Thirty-fourth Annual Meeting. 
other points. We have got the plant that produces the food; 
we grow the bass with this vegetation, and until something is 
furnished which is better, it seems as though it is the plant we 
want to use. 
Mr. Lydell: If there is any aquatic plant which we can 
substitute for the chara, and which has superior food producing 
qualities, we want it, but we would like to grow 5 or 6 or pos- 
sibly too fish to every foot of water. So if you have any old 
weed that will produce the food, produce the weed. (Laugh- 
ter.) If we have been working in the dark and produced thou- 
sands where we could produce millions of fish, we should like to 
be convinced of our mistake. 
Dr. Evermann: The characters of the different species of 
chara depend on the ground. I have seen some places where 
there is very little lime in the soil or water, where none of the 
species of chara would do well. In this lake that I have in mind 
there is a wide belt of marl beginning out at a depth of perhaps 
2% or 3 feet and extending on into the water 8 or Io feet in 
depth. Well, on the outer half of the strip of marl, and further 
on to the shore, various species of chara grow in abundance, 
but in some other parts of the lake they do not. When, how- 
ever, we came to the end of one of these chara patches, where 
there is a certain species of Potomogeton with the broader 
leaves, not the fine-leaved Pectinatus, we found the young bass ; 
but we did not find them under the fine-leaved Pectinatus at all. 
