292 



SUBJECT INDEX 



of egg, 64; sperm, 87, 89, 90; seminal 

 fluid, 93; spicules, 111; metamorphosis, 

 117; lithium, 190; many references in 

 Compilation, mostly under Other Spe- 

 cies after each topic 



Echinus niger, see Tetrapygus niger 



Ectoplasmic layer, see Hyaline layer 



Egg albumin, on perivitelline space, 202 



Egg extracts, cleavage, 161, 163; enzymes, 

 177; parthenogenesis, 200; permeability, 

 205 



Egg-fish, egg-urchin, 4, 5 



Egg fractions, 121, 129-130; Table 9; Fig. 

 12, Plate VII; size and centrifugal force, 

 131; Table 10; Plate XIII; size when 

 centrifuged in hypo-hypertonic sea water, 

 131; Table 11; Plate XIV; size when 

 centrifuged in single salts, 132-133; Plate 

 XV; effect of temperature, pressure, 

 radiation, 133; properties, 135-137; os- 

 motic behavior, 136, Table 12; develop- 

 ment, 139-144; size necessary for devel- 

 opment, 144; enzymes, 177; lipids, 189 



Egg, structure, immature, 72; mature, 81 



Elaeocytes, see Amoebocytes, 149, 150 



Electrical method of sex determination, 49 



Electrical properties and effects, see Com- 

 pilation, 175-176 



Electrolytes, in eggs, 166; in sea water, 

 166; permeability, 204 



Embryology, history, 17; development, 95- 

 117 



Entrance cone, see Fertilization cone 



Enzymes, see Compilation, 177-178 



Ericius, 3, 4 



Erinacius eutopaeus, 3 



Erizo de mar, 4 



Eserine, cleavage, 163; phosphorus metab- 

 olism, 207 



Esterases, 177, 178 



Ether, on cleavage figure, 104; see Anaes- 

 thetics in Compilation 



Ethylene glycol, on chromatophores, 159 



Etymology, 3-7 



Eucidaris, rock-boring, 39; "slate pencil" 

 urchin, 63; classification, 63; egg size, 63 



Feeding habits, 35; of plutei, 113 



Fertilization, history, 17; description, 95- 

 96; Plates III and V; oxygen lack, 107; 

 after fertilization and parthenogenesis, 

 107-108, 180; inhibited by red amoe- 

 bocytes, 150, 175; pressure, 211 



Fertilization cone (entrance cone), 95; 

 Plate III, 3 



Fertilization membrane, see Compilation, 

 178-181; 83, Fig. 10 



Fertilizin, see Compilation, 182; 92 



Feulgen reaction, 141, 194 



Fireworm, lunar periodicity, 57 



Fisher's Island sea urchins, 40, 52 



Flattening of egg, 78 



Flavin enzymes, 178 



Folklore, 20 



Food for man, in Greece and Rome, 8, 13, 

 22; Pompeii, 22; Italy, 22; France, 23; 

 England, 23; N. America and S. America, 

 23; West Indies, 24; Bermuda, 24; Japan, 

 24; food for animals, 24, 25; Fig. 5 



Forced shedding, 57-58 



Formalin, on viscosity, 225 



Fossils, 4, 11, 20-21; see Jewstones, chalk 

 eggs, folklore 



Fractions, see Egg fractions 



Fragment (size), capable of development, 



'44 

 Freezing point depression, 196 

 Frutta di mare, 22 

 Fucus, 35 

 Fundulus, 35 



Gastrula, gastrulation, 109-110; Plate III, 



23, 24; alcohols, 152 

 Genital plates, 30; Plate I and Fig. 6 

 Genital pores, 30; Plate I and Fig. 6; sex 



dimorphism, 48 

 Geographical names derived from Echinus, 



in Greece, 11 

 Geotropism, 44; blastulae and gastrulae, 



45 

 Germinal vesicle, 71, 72; Table 1; Plate 



II; centrifuged, 74; permeability, 81 

 Gestell, 17, 1 8 

 Glycerine, cleavage, 163; parthenogenesis, 



200 

 Glycocol, cleavage, 163 

 Goblin, 3 

 Golgi bodies, 85 



Gonads, 31; Fig. 7; gonad wall, 31; re- 

 moval, 58 

 Goniocidaris, sex dimorphism, 48; brood 



pouch, 52, 53; Fig. 8; classification, 63 

 Gonopores, see Genital pores 

 Granules in egg, 85; Figs. 9, 10; in 



centrifuged egg, 125, Fig. 12; Plate VII; 



stained, 125, 126, Table 8; see under oil, 



mitochondria, yolk, pigment 

 Greek, Greeks, 3, 8-13; food, 13, 22 

 Growth and age, 36-38 



Habitat, 38 

 Hatching, 97, 109 

 Hatching, enzyme, 109, 177 

 Heat production, see Compilation, 182 

 Heavy water, cleavage, 164; permeability, 

 203 



