392 



wind was in the south on May 1 1. We found large quantities of carp 

 eggs in the swale — on the bottom and on floating drift. About half 

 of them were quite fresh in appearance and showed no fungus ; the 

 rest were older and largely fungused. They probably belonged to a 

 lot spawned before or on May 9, about which dates also carp were 

 splashing here, according to Beck and J. C. Schulte. 



May /J. The water in Schulte's field is now 12 to 18 inches deep. 

 Many carp eggs were found in grass and leaves, both submerged and 

 floating, chiefly in water about 6 inches deep. 



May I J. Eggs brought in from Danhole's field May 9 are begin- 

 ning to hatch. 



May 14. Visited Danhole's field in afternoon. Few carp eggs to 

 be seen. About the last of the eggs on which observations were made 

 May 9 and 12, have hatched or disintegrated. Tried pumping up 

 newly hatched fry from the bottom with a small bilge-pump, with 

 coarse silk-net over spout, but got none. 



May 75. The last of the eggs brought into the laboratory from 

 Danhole's field May 9, hatched today. The loss by fungus has 

 amounted to about 70 per cent. The smaller percentage of fungused 

 eggs than the 90 per cent, found in the field is doubtless due to the 

 fact that the fungused eggs were carefully picked out and thrown 

 away every day in the laboratory. 



May 18. Carp fry in Danhole's field have been hatched a week. 

 They were easily taken today in large numbers with a small cheese- 

 cloth seine. The largest numbers of fry are found in about 2 ft. of 

 water, where the bottom is thickly covered with bog rush and scatter- 

 ing flag and smartweed. No fry can be seen anywhere near the sur- 

 face. They are probably swimming and feeding near the bottom. 

 The water at all levels, in a depth of only i to 2 ft., is swarming with 

 a rich entomostracan plankton. 



May ip. Carp eggs brought into la.lx)ratory from Danhole's field 

 May 12, are all hatched and doing well. These eggs were probably 

 spawned between May 9 and 12 (see above). 



May 24. Took large numbers of carp fry half an inch long in 

 Schulte's field, in the shallower portions, where water was only 6 to 

 12 inches deep, with weedy or grassy bottom. In the deeper parts of 

 the field — 18 inches and over — with open mud bottom and no vegeta- 

 tion but scattering smartweeds, no fry were found. Tests with silk 

 net showed that there was much less plankton over soft mud in this 

 open water, which is apt to l)e roiled by wind because of shallowness, 

 than in the shallower vegetation-filled portions of the field, where 

 there was instead a very rich entomostracan plankton. 



