. On the anatomy of vertebrates [electronic resource] . Transverse section of temporary cartilage inthe first stage of ossification, cl. SO in some 22 ANATOMY OE VERTEBRATES. degree, characterise, by their shape and size, the osseous tissue ofthe respective vertebrate classes. In the concentric laminae sur- 11. Plasmatic canals in a fish-bone. a transverse, b longitudinal, sectionof vascular canal (.Tomes, cl.) rounding the vascular canal, fig. 15, a, a, the bone-cells arearranged concentrically, between the lamina?, with the long axis12 13

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Keywords: ., bookcentury1800, booksubject, booksubjectbirds, booksubjectfishes