. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Portion of the exfoliated surface of one of the laminae of A. Whiteavesii, Nich., enlarged twice, showing the superficial eminences and the rosette-like openings of the astrorhizal canals. Devonian, little Red River, Canada. (Coll. Geol. Survey Canada.) far that they are entirely circumscribed and do not appear to send out any radiating horizontal branches. Each astrorhiza in fact consists simply of a group of short vertical canals, of larger calibre than the ordinary zooidal
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. Portion of the exfoliated surface of one of the laminae of A. Whiteavesii, Nich., enlarged twice, showing the superficial eminences and the rosette-like openings of the astrorhizal canals. Devonian, little Red River, Canada. (Coll. Geol. Survey Canada.) far that they are entirely circumscribed and do not appear to send out any radiating horizontal branches. Each astrorhiza in fact consists simply of a group of short vertical canals, of larger calibre than the ordinary zooidal tubes, which open in a rosette-like cluster at the summit of the eminences above spoken of, the canal-apertures often having a distinctly radial arrangement (woodcut, fig. 2).. 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 London, Taylor and Francis, Ltd
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Keywords: ., bookce, booksubjectbotany, booksubjectgeology, booksubjectzoology
