GENERAL INDEX. 
491 
Page 
spotted squetaegue. _ 164-169 
sucker _ iM 2 
trout IM.. p 164-169 
weakfish v..- 164-169 
squamifer, Hydroehus __ 263 
squeteague 1^... : U -.... 145 
age at maturity.. SkB8 158 
description 145, 150 
development ..-.C 150, 151 
distribution, seasonal 158 
eggs and development 150, 151 
embryology.. a... 151 
fishery for 150 
food. 159 
growth .... 157 
habits 145 
maturity, age at 158 
movements and seasonal distribution 158 
silver... 169,170 
size and weight attained 158 
southern 164-169 
spawning grounds and season ... 150 
spotted 164-169 
stagnalis lillianae, Lymnsea itii— 245 
star drum 175 
star-headed minnow 4 
Staurastrum. 461 
brevispinum 461 
gracile.-Btt| 399,404 
sp 399, 401, 405, 461 
staurogenieeforme, Tetrastrum 461 
St. Croix, Lake 350-438 
physiography 360 
plankton, composition of 399, 
vertical distribution of 384 
volume of. ‘ ''■■■■ 
water, temperature and transparency of 
Steilacoom Lake, Wash.: 
plankton 103, 
thermal changes and gas conditions of 67, 
Stellifer lanceolatus 145, 170, 175-177, 
description . __ 
food 176,177, 
growth 175,176 
habitat 199 
spawning Leal 
Stentor coeruleus 
Stephanodiscus 411, 451, 
niagarsB 399, 401, 402, 404, 405, 408, 
Stevens, Lake, Wash.: 
depth, temperature, and dissolved gases.. 120 
plankton ®_. 103, 132 
Stigeoclonium 
Stolephorus brownii.. 163 
stomias, Salmo 255,256 
stone-roller 2, 253 
striatus, Berosus 237, 238, 263, 307-313 
Hydrobius 309 
Tabanus 246 
striped sucker 3 
Strophitus edentulus .... _______ 218 
undulatus. ......... ............ ....... 444 
sturgeon 419 
stylata, Diurella •_ 400, 403 
SynchsBta 400,408 
stylatus, Rattulus 400 
subcupreus, Creniphilus 263 
Page 
subflexilis, Melosira tfifcfiflS 402 
sucetta, Erimyon... 2 
sucker 419 
as beetle eaters 255 
black . 2 
chub ...... 2 
comihon .... 254 
pond. 2 
spotted 2 
striped 3 
Sullivan Lake, Wash.: 
description 95 
plankton...... 95,132 
thermal changes and gas conditions 68, 120 
summer trout— ........ 150-164 
sunfish... 254 
blue-spotted L-._ 6 
common 258 
green 32,253,257 
large-eared i 6 
long-eared : 257 
pigmy. jatetSsrfjflaa*.: .... 5 
scarlet ..•Mb.j.Li 257 
symmetrical... 257 
sun perch .... 5 
sun trout... 150-164 
surf whiting — 2 195 
Surirella biseriata 402 
cardinalis 402 
minuta 408 
splendida 402 
Surirellae 402 
Sutherland Lake, Wash.: 
depth, temperature, and dissolved gases 120 
description .... 99 
plankton 99, 132 
Swan Lake, Wash.: 
depth, temperature, and dissolved gases 120 
plankton 104, 132, 133 
symmetrical sunfish ... 257 
symmetricus, Lepomis... 257 
Synchaeta . 411 
stylata ...... 400, 408 
Synedra .... ._ 411 
delicatissima 399, 401, 402, 404, 408, 410 
splendens j ..- ...... 408 
ulna v. capitata ..i.-.....-.-.-. j... — 408 
Tabanus striatus. 246 
tabulatum, Peridinium.. » ..... 461 
tadpole cat , 253, 254 
tadpoles .... ..a. ..... 21- 
tagging adult red salmon, Alaska Peninsula Fisheries 
Reservation, summer of 1922 39-50 
Tahoe, Lake, Calif.: 
carbon dioxide content— 71 
description ...... .... ....... 109 
diurnal migration of plankton... 112 
mackinaw trout in 73 
plankton 111,112,133 
diurnal migration of ... 112 
temperatures. Ill 
thermal changes and gas conditions. 68, 111, 120 
Tapps, Lake, Wash. 
depth, temperature, and dissolved gases 120 
plankton 104, 134 
tar acids and bases, toxicity of for Limnoria lignorum. 225, 226 
teal, blue-winged 248 
