. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. ?? ?•w5t:r,vfT ; Thin sections of Heteropora neozelanica, Busk (recent). A. Part of a tangential section taken just below the actual surface, enlarged fifty times. The zooecia are cut across in their outer thickened portion ; and the canaliculi traversing their thick walls and communicating with the smaller interstitial tubes are well shown, as are the delicate radiating spines projecting into the cavities of both the sets of tubes. B. Part of a transverse section of a branch,
. The Annals and magazine of natural history; zoology, botany, and geology. Natural history; Zoology; Botany; Geology. ?? ?•w5t:r,vfT ; Thin sections of Heteropora neozelanica, Busk (recent). A. Part of a tangential section taken just below the actual surface, enlarged fifty times. The zooecia are cut across in their outer thickened portion ; and the canaliculi traversing their thick walls and communicating with the smaller interstitial tubes are well shown, as are the delicate radiating spines projecting into the cavities of both the sets of tubes. B. Part of a transverse section of a branch, showing the thin-walled angular condition of the zocecia in the axis of the stems, the comparative paucity of inter- stitial tubes, and the total or almost total absence of connecting canaliculi in this region (enlarged 50 times). C. Part of the median longitudinal section of a branch (enlarged 18 times), showing principally the outer thickened portions of the zocecia. The section shows distinct cross par- titions (or "tabulae") crossing the cavities of the tubes towards the deeper parts of the branch, as also the canaliculi crossing the walls, and the pores representing the openings of these on the backs of the tubes. D. Part of a transverse section in its outer portion, where the zocecia are laid open longitudinally (enlarged 50 times). The section shows the peculiar structure of the thickened walls and the canaliculi crossing these. A few of the delicate radiating spines are also seen, a a, the proper zocecia; b b, the interstitial tubes ; c c, the walls, with the con- necting 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
