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Flatters & Garnett, Ltd., Manchester. ♦ Section BB 1 8—PINUS SYLVESTRIS, SCOTS PINE. Reproduction and Development. A fine series of photographs and photomicrographs by the late Mr. W. T. Haydon, F.L.S., of Liverpool, who made an extensive study of this subject. The following is a small selection from over 130 separate photographs, which cover the whole range of development of the plant from the earliest stages. Customers can have full particulars of the subjects not listed on application. Plain Slides 1 Tlie Pine tree. (The sporophyte.) 3 Ovulate, and staminate branches. 4 Apex of ovulate cone-bearing branch, earliest indication of developing cone. 6 Young ovulate cone, resting stage, winter, end of first year’s growth. £ Young ovulate cone, showing bracts, and the scales which will eventually bear ovules. 11 Embryo sac, macrospore mother cell, x 9G. 13 First division of embryo sac nucleus, macrospore mother cell division, x 2S0. 15 Male gametophyte, in stages of develop- ment (pollen), x 96. 29-25 Mega spore mother cell; pollen grains on nucellus, x 96. 42 Nucellus with three pollen grains, “ stalk ” and “ body ” cells, also showing a tube nucleus; below is a portion of a young female gametophyte, x 96. 46 "‘Body” and "stalk” eells leaving pollen grain, x 280. 48 Young archegonia, x 96. 52-53 Central cells, the nuclei in spirem stage; funnel-shaped entrance for pollen tube, x 96 (two negatives). 55 Mitosis of central cell, nearly complete; egg nucleus, x 96. mly, 1/6 each. 59 Mitosis complete; egg nudlei in archegonia travelling towards centre of egg, x 96. 66-67 Adjoining sections showing path of pollen tube, with contents, x 90 (two negatives). G8 Passage of pollen tube, with two sperms at end, x 96. 7 3 Male gamete entering female gamete, x 280. 76 Male gamete entering gamete; second func- tionless gamete seen above, x 96. 84 Egg cytoplasm with “ proteid bodies,” con- tents of “ jacket cells ” passing into egg. x 280. 88-89-90 Fertilised egg, phases in first division; the three sections contain whole of chromatin, x 280. 83 Fertilised egg, mitosis in first division, x 280. 104-105 Fertilised egg, second division; 24 chromosomes, adjoining sections, x 280. 107 T.S. ovule, four free nuclei at base of egg. 118-117 Two embryos on suspensors, with empty egg. 119 Young embryos, much advanced; upper embryo successful, lower one breaking down. 120-121 Fully-developed embryo, L.S. 122 Fully developed seed, L.S. 127-128 Chromosomes in “ jacket cell,” ten in one section, two in the other. Section BB 19.—BRITISH FLORA. * A series of selected photographs from nature taken by competent botanists. Many of those in former Catalogues have been replaced by better. Those marked “A” are taken from growing plants in natural habitats. Those marked “ B ” are close-up views of the plant, showing flowers, fruit, etc. Plain Slides, 1/3 each. Coloured, 2/6 each. (See also Section BB 21.) Arranged (chiefly) according to the London Catalogue, 10th Edition. RANUNCULACE/E. 1 Clematis Vitalba: Traveller’s Joy B 2 Thalictrum flavum: Meadow Rue. B 3 Anemone Pulsatilla: Pasque Flower. A 4 Anemone nemorosa: Wood Anemone. A 5 Adonis annua: Pheasant's-eye. B 6 Ranunculus aquatilis: Water Crowfoot. A 7 Ranunculus peltatus, var. floribundus: Water Crowfoot. A 8 Ranunculus sceleratus: Celery Leaved Crowfoot. A 9 Ranunculus Flammula: Lesser Spearwort. A 10 Ranunculus Flammula: Lesser Spearwort. B 11 Ranunculus Lingua: Greater Spearwort. A 12 Ranunculus auricomus: Goldilocks. A 13 Ranunculus acris: Buttercup. A 14 Ranunculus bulbosus: Bulbous Buttercup. A 15 Ranunculus Ficaria: Lesser Celandine. A 16 Caltha palustris, large bed: Marsh Marigold. A 17 Trollius europoeus: Globe Flower. B 18 Helleborus viridis: Green Hellebore. A 19 Aquilegia vulgaris: Columbine. B 20 Aquilegia chrysantha: Columbine. A 21 Aconitum Napellus: Monkshood. 3 22 Peeonia corallina: Common Paeony. A 23 Actsea spicata: Baneberry. A BERBER I DACE/E. 30 Berberis vulgaris: Common Barberry. B NYMPH/E ACE7E. 31 Nymphtea lutea: Yellow Water Lily. A 32 Castalia alba: White Water Lily. A 33 Castalia alba: White Water Lily. B PAPAVERACE/E. 35 Papaver dubium: Red Poppy. A 36 Papaver dubium: Red Poppy. B 37 Meconopsis cambrica: Welsh Poppy. B 38 Glaucium flavum: Horned Poppy. A 39 Chelidonium majus: Greater Celandine. A 40 Chelidonium majus: Greater Celandine. B FUMARI ACE/E. 43 Corydalis lutea: Yellow Fumitory. A 44 Corydalis claviculata: White Fumitory. A 45 Fumaria officinalis: Common Fumitory. A All Slides may be had Plain— unless otherwise stated. P— Photograph. D— Drawing or Diagram. M— Photomicrograph. T.S.— Transverse Section L.S. — Longitudinal Section. —45—