Essays upon heredity and kindred biological problems / by Dr. August Weismann .. ; edited by Edward B. Poulton ... Selmar Schönland ... and Arthur E. Shipley ... Authorized translation.

  • August Weismann
Date:
1891-1892
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Credit: Essays upon heredity and kindred biological problems / by Dr. August Weismann .. ; edited by Edward B. Poulton ... Selmar Schönland ... and Arthur E. Shipley ... Authorized translation. Source: Wellcome Collection.

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    Rhodites rosae, parthenogenesis of, 325. Richter, on inheritance of acquired characters, 438. Robin, on pole-cells of Diptera, 197* Rolph, on conjugation, 286. Romanes, on correlation, 389. Roth, on heredity, 166, 169. Rotifera, unequal length of life in two sexes of, 58 ; polar bodies of, 350. Roule, on origin of ova, 222. Roux, on the struggle of the parts in the organism, 87, 100 ; on development in altered conditions, 177 ; on forces con trolling nuclear division, 231, 361; on karyokinesis, 359. Rudimentary organs, 88; disappear ance of, 291 ; not found in partheno- genetic forms, 293. Rumia Crataegata, 394. Sachs, on reproduction in Mosses, 212 ; on venation, 260, 310; on shoots of climbing Ivy, 393, 399. Sagitta, segmentation of egg of, 74, 199. Saperda carcharias, length of life of imago of, 47. Sarcophaga carnaria, length of life of, 42. Saturnia pyri, length of life of, 45 ; S. carpini, cocoon of, 94. Saturnidae, habits of, 44. Saw-flies, ancestors of bees and wasps, 19 ; length of life of imago of, 49, 59. Schmidt, on malformations of the ear, 440. Schneider, on instincts of perception, 92, 94. Schultze, on polar bodies of Amphibia, 34 °> 352 . Scytosiphon, male parthenogenesis in, 247 - Sea-gulls’ eggs, 38. Senility, 20, 21, 32, 157. Sexes, unequal length of life in the two, 58 - Sheep, length of life of, 14. Sida, spermatozoa of, 176 ; absorption of ova in, 239. Siebold, von, on development of Bees, 235 - Siphonophora, origin of germ-cells of, 202. Sirenia, 261. Sirex, length of larval life of, 15. Smerinthus tiliae, length of life of imago of, 45 ; ocellatus, 395. Solenobia triquetrella, length of life of female of, 45 ; death of partheno- genetic forms of, 64, 293. Solidago, time of flowering changed, 415 . Soma, 122, 125. 130, 140, 144, 154, 155. Somatic cells, 27, 28, 75, ill, 145, 158. Somatogenic characters, 412. Somatoplasm, 104, 180. Spathegaster, 49. Spencer, Herbert, on relation of absorb ing surface to size of animal, 7 ; on in fluence of diminished nutrition, 241 ; on correlation, 389. Spirogyra, on cell-division in, 216. Sponges, polar bodies of, 217. Spontaneous generation, 34. Sprengel, on colours in flowers, 308. Squirrel, length of life of, 14. Stahl, on protective structures in plants, 260. Strasburger, on fertilization of Phanero gams, 178, 340,355 ; on cyto-idioplasm, 181 ; on influence of nuclei, 184; on identity of daughter nuclei, 187 ; on nuclei of sexual-cells, 200, 215, 246; on transmission of germ-plasm, 209 ; on cell-division in Spirogyra, 216; on development of pollen-grains, 222 ; on parthenogenesis, 237 ; on direction of growth of pollen-tube, 247 ; on here dity» 354» 369, 369; on polar bodies in plants, 377. Strepsiptera, length of life of, 41 ; un equal length of life in two sexes, 58, 59 - Succineae, length of life of, 55. Swans, length of life of, 37. Tagetes, production of double flowers of, 408. Talents, transmission of, 95 ; nature of, 96. Tape-worms, 133, 155^ Termites, duration of life of, 18, 40. Terns’ eggs, 38. Thuja, dorso-ventral structure of shoots of, 39 B 39 6 - Tillina magna, 118, 148. Toad, length of life of, 6. Transmission of acquired characters, 73, 80, 169, 267, 407, 411 ; want of evidence of the, 81 ; unnecessary for the theory of evolution, 83 ; unproved, 105, 142; amongst Protozoa, 278; supposed botanical proofs of, 387. Trematodes, parasitic in Mollusca, 57, llh 133 - Trichodinidae, conjugation of, 287. Trichoplax adhaerens, 141. Tridacna gigas, length of life of, 56. Trinchese, on polar bodies, 189, 224. Tropaeolum, two kinds of leaves of, 396. Turkey, the length of life of, 36. Twins, 380. Unicellular organisms, immortality of, 25 » 27. Unio, length of life of, 56, 57,
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