...Each one of the perforations is the entrance to an oblique tunnel, whichis bored in the medullary sheath of the twig... 
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...What His takes to be a simple physical process—for instance,the folding of the germinal layers (in the formation of the medullary tube,alimentary tube, etc...
Ernst Haeckel 「The Evolution of Man」
...A the medullaryswellings (the parallel borders of the medullary plate) begin to rise; in Fig...
Ernst Haeckel 「The Evolution of Man」
...B In the middle of the germinal disk we find the medullary groove(mr), and underneath it the chorda (ch)...
Ernst Haeckel 「The Evolution of Man」
...The two paralleldorsal or medullary swellings that enclose it growtogether over it afterwards, and form the medullary tube...
Ernst Haeckel 「The Evolution of Man」
...129 ne), from the medullary tube (sp) to the gastrictube (pag)...
Ernst Haeckel 「The Evolution of Man」
...)rf dorsal furrow, in the middle of the medullary plate, h, prprimitive groove (mouth), stz dorsal (stem) zone, pz ventral(parietal) zone...
Ernst Haeckel 「The Evolution of Man」
...) d primitive gut,u primitive mouth, p polar cells of the mesoderm, ccœlom-pouches, m their first segment, n medullary tube, ientoderm, e ectoderm, s first segment-fold...
Ernst Haeckel 「The Evolution of Man」
...As the upper edges of two opposingsomites grow together over the medullary tube from right and left, thevertebra-arch becomes closed...
Ernst Haeckel 「The Evolution of Man」
...Beside the medullary tube we can see on each side three clearstreaks in the dark dorsal wall, which advance into the rudimentary fore-limbor wing (e)...
Ernst Haeckel 「The Evolution of Man」
...The perichorda forms a cylindrical tube immediately over thechorda, and the central nervous system, the medullary tube, is enclosed in it...
Ernst Haeckel 「The Evolution of Man」
...This groove is, of course, the dorsal furrow,and the swellings are the dorsal or medullary swellings; they form the firststructure of the central nervous system, the medullary tube...
Ernst Haeckel 「The Evolution of Man」
...Thus, for instance, the chief part of the central nervoussystem is a long dorsal neural string that runs above the gut and correspondsto the medullary tube of the Chordonia...
Ernst Haeckel 「The Evolution of Man」
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