. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. Fig. 104. Tangential or obliquely tangential sections through dermal shield of Allocryptaspis laticostata. A, Dentine ridge and two intercostal grooves, show- ing clusters of dentine tubules arising from pulp chambers; CNHM, slide 4594 (X 90). B, Oblique section through superficial layer (at top) and reticular layer, showing parts of five dentine ridges and six intercostal grooves, the latter with small slit-like openings at the surface; CNHM, slide 4597 (X 30). C, An oblique section through the reticu
. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. Fig. 104. Tangential or obliquely tangential sections through dermal shield of Allocryptaspis laticostata. A, Dentine ridge and two intercostal grooves, show- ing clusters of dentine tubules arising from pulp chambers; CNHM, slide 4594 (X 90). B, Oblique section through superficial layer (at top) and reticular layer, showing parts of five dentine ridges and six intercostal grooves, the latter with small slit-like openings at the surface; CNHM, slide 4597 (X 30). C, An oblique section through the reticular layer; CNHM, slide 4594 (X 30). D, A tangential section through the cancellous layer; CNHM, slide 4596 (X 30). 339. 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 Denison, Robert H. (Robert Howland), 1911-1985; Chicago Natural History Museum. Chicago : Chicago Natural History Museum Press
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