360 
Spherid, anaerobic, 133. 
Spiders, 167. 
Spiders, scientific names: 
—Acrosoma: 
gracilis, 238, 240, 260. 
Spined, 238, 240, 260. 
—A gelena naevia, 207, 218, 254, 206. 
—Anyphaena conspersa, 260. 
—Argiope: 
aurantia, 263, 264, 276, 296. 
trifasciata, 204, 205, 208, 232, 259, 
263, 293, 296, 2098. 
—Alttus palustris, 276. 
—Altypus milberti, 277. 
—Castianeira cingulata, 197, 207. 
—Chiracanthium inclusa, 187, 205. 
—Clubiona obesa, 277. 
—Dendry phantes: 
militaris, 205, 206. 
oclavus, 204, 205, 206, 228, 258. 
—Dictyna: 
foliacea, 206, 208, 228, 232, 257, 276. 
sublata, 187, 204, 207. 
—Dictynidae, 257. 
—Dolomedes: 
sexpunctatus, 146, 169, 187, 283, 296. 
lenebrosus, 243. 
—Epeira, 198, 232: 
domicilorum, 240, 257, 306. 
foliata, 187, 204, 206. 
gigas, 194, 205, 200, 208, 240, 257, 272. 
ocellata, 206. 
prompta, 204. 
trifolium, 205, 276, 277, 206. 
trivittata, 188, 205, 214, 276, 284, 203, 
296. 
—Epeiridae, 208, 257, 260. 
—Eucta caudata, 187. 
—Eugnatha straminea, 204, 296. 
—Gayenna celer, 260. 
—Geolycosa pikei, 220, 227, 230, 250, 252. 
—Habrocestum pulex, 206. 
—Hypselistes florens, 207. 
—Leucauge hortorum, 202, 208. 
—Linyphia phrygiana, 260. 
—Lycosidae, 261. 
—Maevia niger, 260, 277, 208. 
—Mangora maculata, 206, 260. 
—Misumena vatia, 214, 264, 285, 296. 
—Misumessus: 
asperatus, 231, 232, 257, 203. 
oblongus, 207. 
—Notionella interpres, 261. 
—Ozyplila conspurcata, 2096. 
—Pardosa, 215: 
lapidicina, 213, 214, 215, 254. 
—Phidippus: 
audax, 207, 264. 
borealis, 297. 
ANIMAL COMMUNITIES 
podagrosus, 204, 293, 208. 
rufus, 298. 
—Philodromus: 
alaskensis, 223, 228, 257. 
ornatus, 205. 
pernix, 259. 
— anes 
insularis, 187. 
montana, 204. 
piratica, 206. 
—Pisauridae, 204. 
—Pisaurina, 108: 
undata, 204, 206, 208, 277. 
—Plectana stellata, 204. 
—Runcinia aleatoria, 204, 214, 277, 293, 
206. 
—Singa variabilis, 276. 
—Tetragnatha: 
grallator, 205, 206. 
laboriosa, 169, 187, 208, 263, 276, 
284, 285, 296. 
—Theridiidae, 257. 
—Theridium: 
frondeum, 191, 202, 206, 208, 240, 
257, 258. 
spirale, 228, 258: 
—Thodina puerpera, 204. 
—Thomisidae, 257. 
—Tibellus duttoni, 187, 204. 
—Trochosa cinerea, 222, 252. 
—Wala mitrata, 261. 
—Xysticus formosus, 228, 258. 
—Zygoballus bettini, 206. 
Spittle insects, habits of, 202. 
Sponge, abundant in stream, 97. 
Sponges, scientific names: 
—Heteromeyenia argyrosperma, 153. 
—Meyenia: 
crateriformis, 153. 
fluviatilis, 153. 
—Spongilla, 116, 131: 
fragilis, 153. 
Spontaneous movement, 26. 
Springtails, 180. 
Squirrels: 233; fox, 245; Franklin 
ground, 269, 274; gray, 192, 202, 245; 
ground, 167, 227, 286; red, 245. 
Stations of study, 50, 51-56. 
Statoblast, 1209. 
Stickleback, 85. 
Stimulus, defined, 26. 
Stinkbugs, hibernating, 202. 
Stonecat: 119; slender, 95. 
Stone-fly nymphs, scientific name: 
—-Perla, 78, L10, 120. 
Stone-roller, 119, 120. 
