[1922] 
IX. Crustacea, 
Crust. 15 
Tropisms (see also Physiology). — 
Phototropism, Copepoda ; Page and 
Legendre, 85 ; Hyalella knicker- 
bockeri ; Gaylor, 95 ; white and 
coloured light, Copepoda ; Erhard, 
83 ; Change of phototropism at meta- 
morphosis, Palaemonetes ; Sollaud, 
200 ; Phototaxis, Geotaxis, Thermo- 
taxis, Rheotaxis, Cladocera ; Naumann, 
155 ; Chemiotaxis, Daphnids ; Buy- 
tendijk, 42 ; Influence of Radium on 
germ-cells, Cyclops ; Alverdes, 4. 
Phenology, Migrations, Hydrography. 
— Seasonal quantitative variation, 
horizontal and vertical distribution, 
periodicity, daily vertical migration, 
etc. ; Brutschy, 40. Haempel, 
106 ; Litynski, 141 ; Danish Crus- 
tacea ; Poulsen, 175 ; fresh- water 
plankton, Scheffelt, 191 ; plankton 
Swiss lakes ; Thieler, 226 ; Copepoda, 
Cladocera ; Baumbach, 20 ; Ostracoda ; 
Schreiber, 195. Conditions of Light 
and Temperature, subterranean Crus- 
tacea ; Ciiappuis, 51 ; Effects of 
temperature, season, etc., on distribu- 
tion, Calanus, Plankton ; Bigelow, 24. 
Habitats. — Crustacea as criteria for 
bathymetrical zones ; Monod, 149. 
Relict faunas. Russia, Cladocera, 
Copepoda ; SiiaciianiN, 198. 
Bottom faunas (marine) ; Sparck 
and Lieberkind, 202. 
Lacustrine ; Annandale, 5 ; In 
wells, pools and rain water, Gammarus 
pulex ; Wundsch, 250 ; Spring, 
Thermal and Salt waters, N. Africa ; 
Seurat, 197 ; In Artesian bore water 
(hot), Phreatoicus ; Chilton, 62. 
Subterranean, Cavernicolous ; Ciiap- 
puis, 51 ; Tiiienemann, 227 ; Amphi- 
pods ; Akatsuka and Komai, 2 ; Muni- 
dopsis polymorpha ; Harms, 107 ; 
Asellus ; Racovitza, 177. 
Brackish water. Zuiderzee; Clado- 
cera, Copepoda; Lint, 138; Cirripedia; 
Croenewegen, 103 ; Isopoda ; Nier- 
strasz, 157 ; Amphipoda, Schizopoda, 
Decapoda, Tesch, 223, 224 ; Gam- 
maridae ; Schlienz, 194. 
Shore ; Monod, 149 ; Fiddler crabs ; 
Hyman, 116; Lagoon; Johansen 
122 ; Arable soil ; Morris, 152. . 
Moss, Harpacticid ; Menzel, 143. 
Plankton (marine). — Bigelow, 24 ; 
Lebour, 133; Lint, 139; Litynski, 
140 ; Robert, 182 ; Zuiderzee, Clado- 
cera, Copepoda ; Lint, 138 ; Adriatic, 
Szuts, 219. 
Plankton (fresh-water). — Arevalo, 
7 ; Baumbach, 20 ; Brutschy, 40 ; 
Chappuis, 51, 52 ; Ciiarlemanj, 54 ; 
Decksbach, 74; Fritz, 88; Garcia, 
94 ; Gaylor, 95 ; Grese, 102 ; 
Haempel, 106 ; Henry, 111 ; Herr, 
112; Jungmayer, 124; Litynski, 
141 ; Robert, 182 ; Rylov, 186 ; 
Scheffelt, 191 ; Tiiienemann, 227 ; 
Verestsciiagin, 232 ; Walter, 237 ; 
Wundsch, 250; Yung, 251 ; Ziegel- 
mayer, 253 ; Artemia salina ; Abonyi, 
1 ; Cladocera ; Hartmann, 108 ; 
N aumann, 155 ; Copepoda, Cladocera ; 
Shachanin, 198 ; Ostracoda ; Schrei- 
ber, 195 ; Swiss lakes ; Thieler, 226* 
Parasitism and Symbiosis. — Speci- 
ficity for one host ; Monod, 150. 
On fish, Copepoda ; Leigh-Siiarpe, 
135; Phillips, 168; Wilson, 242; 
On Salmon, male Salmincola ; Fasten, 
86 ; On Roach, Argulus ; Ritchie, 
180. 
On Macrura ; Chopra, 63 ; On 
Crabs, Sacculina ; Vaulx, 231. 
Commensalism. — Crab and Sea- 
urchin ; Gravier, 100 ; Cirripede 
and sponge ; Gravier, 101 ; Hermit- 
crab and Polyzoan ; Kirkpatrick 
and Metzelaar, 128 ; Hermit-crabs 
Poulton, 174 ; Hermit-crab', Sea- 
anemone, and Nereis ; Orton, 162, 
163 ; Hydroids and Isopods ; Stechow, 
206. Alcyonaria and Crustacea, and 
commensals of Brachyura ; Hornell, 
114 ; Pinnoteres and Ascidian ; Szuts, 
218 ; Pontoniinae ; Kemp, 125. 
VARIATION AND ETIOLOGY. 
Variation, Mutation. — Artemia salina, 
Abonyi, 1 ; Gajewski, 92 ; Copepoda ; 
Lint, 139 ; with sex and growth, 
Entomostraca ; Philiptsctienko, 169 ; 
Local, Copepoda, Cladocera ; Baum- 
bach, 20 ; Cyclops ; Ziegelmayer, 
253 ; Seasonal, Hyalella knickerbockeri ; 
Gaylor, 95 ; Gammarids, Mysids ; 
Blegvad, 25 ; Cyclops ; Ziegelmayer, 
253.. 
