780 



STUDIES IN GENERAL PHYSIOLOGY 



JUNE-BUG LARVAE : heliotropism of, 20, 71. 



LACK OF OXYGEN: influence of, on fish 

 embryos, 309 ff . ; and Perca fluviatilis, 

 320; physiological effects of, 370 ff.; 

 and Copepods, 373; and Ctenolabrus 

 eggs, 374; influence of, on Fundulus 

 eggs, 375, 397 ; and segmentation of egg, 

 400 ff . ; and cardiac activity of fish em- 

 bryo-', 404; and Cyclas larvae, 417 ; and 

 heliotropism, 417; and pigment cells, 

 420. 



LEECHES: heliotropism in, 73: oral end 

 more sensitive to light, 78; stereotro- 

 pism in, 79; lack of regeneration in, 341 

 ff.; brain physiology of, 361. 



LEPIDOPTERA: heliotropism in, 7, 37, 40, 

 54, 56, 61, 74, 86; chemotropism in, 112. 



LEUCOCYTES : migration of, due to 

 stereotropism, 111. 



LIGHT : effect of direction of ray on 

 movements, 2, 4, 5, 16, 53. 91, 108, 265; 

 effective rays of, 3, 5 ; effect of change 

 in intensity of, 3,82,276; effect of, on 

 swarm-spores of algae, 5 ; effect of, on 

 Lepidoptera, 7 ; effect of, on Protozoa, 

 7; mechanical effects of, 7; effect of, 

 on water fleas, 8 ; effect of, on Daphnia, 

 9; influencing "instinctive" move- 

 ments, 107, 109; effect of, on develop- 

 ment of organs, 42 r > ff. ; effect of, on 

 Fundulus embryos, 434 ff. 



LIMULUS POLYPHEMUS : heliotropism in, 

 267. 288; locomotion dependent on 

 sense of heliotropism of, 284. 



LOLIGO: heliotropism in, 291; geotro- 

 pism in, 292. 



Loss OF WATER : effect of, on cleavage, 

 253: influence of, on embryos, 309, 314. 



LUMBRICUS FCETIDUS: brain physiology 

 of, 359. 



LYMN^EUS STAGNALIS : growth in, 229. 



MACH^ERITES: blindness of, as related 

 to sex, 56. 



MARGELIS : heteromorphosis in, 628 ff . 



MATURATION: of unfertilized eggs of 

 star-fish, 728 ff . 



MEDUSA : periodic migration of, 366; ion- 

 prpteids in, 544; locomotion of, 553; 

 effects of Ca ions on, 753. 



MELOLONTHA VULGARIS: heliotropism 

 in, 71. 



MESOCARPUS : influence of light on, 6. 



METAMORPHOSIS: influence of central 

 nervous system on, 436. 



MICELLA : conceptions of, 334. 



MIGRATIONS OF ANIMALS: influence of 

 geotropism on, 180; physiological con- 

 ditions determining, 289 ff. 



MOTHS: heliotropism in, 7, 38. 



MULTIPLE EMBRYOS : development of, 303. 



MUSCA VOMITORIA: helitropism in, 56, 

 113 ; stereotropism in, 64, 68 ; effect of 

 heat on orientation of, 65; relation of 

 orientation of, to chemical stimuli, 66: 

 movements due to sum of stimuli, 112. 



MUSCLE: absorption of water by, 510 ff. ; 

 rhythmical contractions of, 518 ff. ; 

 contact-irritability of, 692 ff. ; produc- 

 tion and suppression of twitchings of, 

 by electrolytes, 748 ff. 



: stereotropism in, 110. 



NEMERTINES : brain physiology of, 356 ff. 

 NEREIS: brain physiology of , 358 ; artifi- 



cial parthenogenesis in, 772i 

 NERVE: regeneration of, 217, 252; effects 



of fluorides on, 703 ff. 

 NUCLEUS : effect of, on growth. 321 ff. ; 



the organ of oxidation, 508. 



OCELLA : formation of, in Ciona, 216. 

 (EDEMA: influence of osmotic pressure 

 .on, 471 ; increase in osmotic pressure of 

 muscle causing, 515. 



ORAL PLATES: in Cerianthus, 159, 160. 



ORBITOLITES : changes of enucleated 

 pieces of, 506, 507. 



ORGANIZATION: dependent on orienta- 

 tion, 191, 192; relationship of, to 

 growth, 191, 251; internal causes of, 

 205; Sach's theory of, 207, 211, 212, 215; 

 Loeb's theory of, 208; relationship of, 

 to irritability, 213; in Ciona, 215; em- 

 bryonal, 319. 



ORIENTATION: influence of direction of 

 rays on, 2, 4, 5, 16, 53, 91, 108, 265 ; influ- 

 ence of temperature, 3; influence of in- 

 _ ^Bnsif.y of light on, 3, 4, 32; influence of 

 physical laws on, 51 ; influence of form 

 of body on, 75; of plants, 109; com- 

 position of forces in, 112; forms of irri- 

 tability influencing, 174, 251 ; influence 

 of gravitation on, 176, 177, 178; governs 

 regeneration and heteromorphosis, 

 193. 



ORTHOTROPISM : of organs, 2; in dorsi- 

 ventral animals, 97. 



OSMOTIC PRESSURE: relation of, to 

 growth, 228, 240; in bursting of egg- 

 membrane, 306 ; relation of, to absorp- 

 tion by muscle, 466 ; in parthenogenesis, 

 640, 648 ff. 



OTOLITHS : relation of, to geotropism, 

 187, 189. 



OXYGEN (see Lack of Oxygen): role of , 

 in heliotropism, 15 ; relation of, to re- 

 generation, 240, 252; Hoppe-Seyler's 

 theory of action of, 371 ; relation of, to 

 cleavage, 394 ; relation of, to growth, 

 400. 



PANTOPODS : regeneration of, 338. 

 PAPILIO MACHAON : heliotropism in, 42. 

 PARTHENOGENESIS : artificial, 539 ff., 



638 ff.; in Arbacia, 576 ff., 624 ff . ; in 



Annelids (Cheetopterus), 646 ff.; in 



Fundulus, 682; in Gonionemus, 682; 



in Podarke, 682; in Phascolosoma. 



682, 772 ; in Crustaceans, 684 ; sources of 



error in, 765 ff. 

 PERCA FLUVIATILIS: effect of lack of 



oxygen on, 320. 



