282 
BULLETIN OF THE BUBEAU OF FISHEKIES 
of minute crustaceans. Prof. A. A. Doolittle, of the Central High School in Wash- 
ington, D. C., examined some smelts for the writer, and the following notes are taken 
from his report: 
Concerning the food of the smelts of Sebago Lake he wrote that all were col- 
lected in the summer and fall, from July 15 to September 20, over a period of 6 years 
(1906 to 1911). Specimens of all sizes from about % inch to over 14 inches in length 
were examined. After passing above the 6-inch mark the food seems to change from 
an entomostracan diet to one of fish, usually small smelts. The number of Ento- 
mostraca found in fish under 6 inches in length varies greatly, but will average for 
the various lengths about 20)4 to each one-tenth of an inch of length. Many smelts 
far exceed this limit, a specimen about 5)4 inches long having in its alimentary tract 
2,100 Entomostraca, or about 400 to each one-tenth of an inch of length. 
For the small smelts Cyclops and Daphnia are the prevailing genera of Ento- 
mostraca entering into the food. For the larger forms there are added many more 
robust genera, viz, Epeschura and Lida. 
Detailed table showing stomach contents of smelt from Sebago Lake 
Date 
Length 
in inches 
May 30, 1916 ! 
4 54 
Tnnp 9fi’ 1910 - 
1354 
Do 
Do - 
June 27, 1910 
Do 
1254 
12 
H54 
H54 
Do 
Do 
Do 
July 6, 1909 - 
Do 
n 
1054 
9 3 4 
H54 
954 
Do -- 
954 
Do 
954 
Do 
9 
Do 
9 
July 9.1, 1910 - 
9 
’‘'Do . 
854 
Do 
954 
Do - -- --- 
1254 
Do 
1254 
Do 
U54 
Do 
1054 
Do - 
1054 
Do 
10 
Tilly 22 1910 
854 
July 93 7 1908 
Tilly 24 ’ 1910 _ 
854 
954 
Do 
9* 
July 97, 1910 _ . 
10* 
llfi 
"‘'Do -- 
Do --- 
1054 
Do 
1254 
July 98 1909 
954 
‘’Do - --- 
9 
Do - 
13 
Tnly 99, 1907 
754 
Do' --- 
1254 
Do 
1154 
Do - - - 
1154 
Do 
1354 
Do - 
10* 
Tnly 20 1903 
Tilly 30* 1909 
954 
‘Do ’ 
10!4 
Do 
1354 
Do 
1254 
Do 
1054 
Do 
1054 
Stomach contents and remarks 
Insect remains. 
Smelt about 154 inches long. This 1 only, of 5 smelts, contained food. 
Smelt, 454 inches long. 
Backbone of small fish, probably smeltj 
Smelt, 414 inches long. 
Partly digested smelt. 
Backbone of small fish. 
Smelt, 4* inches long. 
Bait. 
Portion of insect. 
Backbone of small fish. 
Piece of smelt 254 inches long. 
Almost digested young smelt. 
Backbone of smelt, 3* inches long. 
Partly digested small smelt. 
Smelt, 4* inches long. 
Piece of fish. 
Small fishbones. 
Nearly digested smelt. 
Partly digested smelt. 
Nearly digested fish. 
Partly digested smelt. 
Nearly digested fish. 
Do. 
2 small smelts, partly digested, largest 354 inches long. 
Partly digested young smelt, 1}4 inches long. 
Caught on 2. 0 salmon hook; bait, chub, 4 inches long. Insect and crustaceans. 
Backbone of small fish. 
Partly digested smelt; may have been about 354 inches long. 
Pieces of backbone of small fish, probably smelt. 
Partly digested smelt. 
Do. 
Do. 
Do. 
Partly digested young smelt. 
Fragments of nearly digested smelt, 2* inches long. 
Bone of small smelt. 
Bait, young suckers. 
Mass of mucus and vegetable matter. 
1 Mysis (?). 
Small amount of unrecognizable material. 
2 gravel stones and vertebra; of small fish (smelt ?). 
2 may-fly larva; and some Entomostraca. 
1 young smelt; only tout of 24 smelts from to 8541194 inches long contained any food. 
Bones of small smelt. 
Partly digested smelt, 4* inches long. 
Partly digested smelt, 454 inches long. 
Partly digested smelt, 4* inches long. 
Partlv digested smelt, 454 inches long. 
Partly digested smelt, 354 inches long. 
