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Schematic illustration of the cement substance in the sagittal section by Chinery.10 (a.p.: aperture; c.p.: conical part, or cone; e.c.: external cement; h.t.: imprints of hypostomal teeth; i.c.: internal cement; i.z.: inner zone, or tube of internal cement; o.z.: outer zone, or lateral strands; t.p.: tooth-like process alternating with the imprints of hypostomal teeth; and w.p.: wing-like part.)
