486 “ 
GENERAL INDEX. 
Page 
melanops, Minytrema 3 
melas, Ameiurus ... 254 
Melosira 402,411,414,460 
crenulata 399, 401, 402, 404-406, 408-410 
granulata ... 399,401,402,409 
spiralis 399 
subflexilis 402 
varians __ 402 
Mendota, Lake, Wis.: 
fauna of 233 
fish food in 76 
thermal changes and gas conditions of. 66 
menenghiniana, Cyclotella 399,402,404,405,408,409 
Menona top minnow 253, 254 
Menticirrhus americanus 186-190, 195, 199 
littoralis 195, 196 
saxatilis... 186, 188, 190-195, 199 
Merismopedia punctata 461 
sp 399 
tenuissima 461 
metamorphosis of Lampsilis luteola 211 
final period of parasitism 214 
first encystment stage 212,213 
middle parasitic stage 214 
occurrence of a placental-like relationship between it 
and host 217 
Metopidia acuminata 409 
Micrococcus rhenanus 411 
Microcystis 406, 464, 465 
flos aquae 399,402 
incerta 461 
sp 399,401,404 
Micropogon undulatus 143, 161, 179, 180, 184, 199 
microporum, Ccelastrum 461 
Micropterus dolomieu 253 
salmoides 7, 254, 258 
militaris, Noteus 400,401 
miniatus, Lepomis 257 
mink, sea 186,190 
minner 3,5 
minnow. 245 
as food for snails 245 
common top 253 
Menona top. 253,254 
mud 4,254,255 
saffron-colored 3 
spot-tailed 253 
star-headed 4 
top 4 
top-water 4 
viviparous top i 257 
minutus, Chroococcus 461 
Gyrinus 263 
Scenedesmus— 399 
Minytrema melanops 3 
mirum, Pedalion 400,409,410 
Mississippi River: 
character. 347,348 
chemical constituents of water 371 
Copepoda and Cladocera, distribution of 387 
crustaceans, distribution of 389 
current, velocityof.. 366 
detritus in 376 
discharge 369 
hydrobiological conditions 348, 349' 
lakes in 349 
limnological observations in 347-438 
physiography 357 
Page 
Mississippi River— Continued, 
plankton- 
composition of 396,403,404 
distribution 349 
horizontal distribution 379 
vertical distribution 379 
volumetric determination of 377 
sediment, flow of 370 
stages 362-365 
temperature 373 
transparency 371 
mites as beetle eaters. 244 
mixtus, Hydrophilus 329 
Tropisternus 243, 263, 324, 327, 329-333 
Moina brachiata 400, 403, 409, 410 
macrocopa 400,410 
rectirostris 387, 400, 401, 403, 404, 406, 409, 410 
mold j 442 
mollusks 259 
Monas sp... 461 
mongrel buff alofish 25 3 
moniliferum, Closterium 399 
Monostyla brilla 400 
cornuta 400,409 
lunaris.. 400,409 
pyriformis 409 
quadridentata 409 
morum, Pandorina 461 
Morzhovoi Bay, salmon-tagging experiments at 42,43 
mosquito control l 
use of fishes for l 
mosquitoes 400,404 
Moxostoma aureolum 253 
macrolepidotum 253 
mucronata, Scapholeberis... 400 
mud cat 2 
mudfish 1 
mud minnow 4, 254, 255 
mud shad ^ 4 
mullet, sea 186, 190, 195 
Virginia 186 
mussels, fresh-water 203-219 
artificial propagation 203 
commercial value 203 
definitive mantle, completion of.. 210 
feeding experiments 462 
broken filamentous material 465 
inorganic material 462 
organic material 464 
time required for passage of food through alimen- 
tary canal 466 
feeding processes 441-443 
first encystment stage of 208 
food 441,444,460 
adults... 461 
ingestion of 206 
juvenile mussels 460 
ingestion ■ 446 
observations and experiments. 447 
selection of material 442,443 
study of sections of palps 457 
mantle cells during parasitism J 204 
mantle cells of glochidium 204 
description 204,205 
granulation 205 
mushroom body, formation of... 208, 209 
Significance of larval mantle during parasitism 203-219 
Mustelus canis - 162 
