. The Eusporangiatae; the comparative morphology of the Ophioglossaceae and Marattiaceae. Ophioglossaceae; Marattiaceae. 6L ,Sm. 45 ni'-'-'. '®^y?s;.. 48 21-29. Spermatogenesis in Ophioglo^iium pendulum. .-^ 950; 21 shows 34-37. Spermalogenesis in B. oirginianum; 38-41, in Kaulfussia; spermatocyte before final nuclear division, with two 42, 43, in Danaea. All X 950. blepharoplasts, bl; 22, 23, nuclear spindle from side and 44. Nearly ripe spermatozoids of Angiopleris. X 950. n, nucleus; pole; 24-29, development of spermatozoid ; n, nucleus of bl, blcpharoplast; c, cilia; i', vesicle. spermatoz
. The Eusporangiatae; the comparative morphology of the Ophioglossaceae and Marattiaceae. Ophioglossaceae; Marattiaceae. 6L ,Sm. 45 ni'-'-'. '®^y?s;.. 48 21-29. Spermatogenesis in Ophioglo^iium pendulum. .-^ 950; 21 shows 34-37. Spermalogenesis in B. oirginianum; 38-41, in Kaulfussia; spermatocyte before final nuclear division, with two 42, 43, in Danaea. All X 950. blepharoplasts, bl; 22, 23, nuclear spindle from side and 44. Nearly ripe spermatozoids of Angiopleris. X 950. n, nucleus; pole; 24-29, development of spermatozoid ; n, nucleus of bl, blcpharoplast; c, cilia; i', vesicle. spermatozoid; c, cilia; V, piotoplasniic vesicle. 45. Nearly ripe archegonium of Dano^a, showing apparent ventral 30-32. Three stages in development of archegonium of O. pendulum. canal cell, v. X 275. b, basal cell; n^, n-, neck canal cells. 46-48 Recently fertilized egg-cells of Dansa. .sp, spermatozoid (>) 33. Venter of archegonium showing apparently a ventral canal cell, 0. within the egg-nucleus. n, one of the nuclei of the neck canal cell. X Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Campbell, Douglas Houghton, 1859-1953. Washington, D. C. , Carnegie Institution of Washington
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Keywords: ., bookauthorcampbelldouglashought, bookcentury1900, bookdecade1910
