...The segmentation is plainly visible... 
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...This cell produces a cluster of cells by segmentation, and fromthese develops the multicellular organism, or individual of higher rank...
Ernst Haeckel 「The Evolution of Man」
...In all real animals (that is, excluding the unicellularprotists) the segmentation of the ovum produces either a pure, primitive,palingenetic gastrula (Fig...
Ernst Haeckel 「The Evolution of Man」
...We might call it“equal” or homogeneous segmentation, because the divided cellsretain a resemblance to each other at first (and often until the formation ofthe blastoderm)...
Ernst Haeckel 「The Evolution of Man」
...In fact, thesevariations have become so great in the course of time that the segmentation wasnot rightly understood in most animals, and the gastrula was unrecognised...
Ernst Haeckel 「The Evolution of Man」
...Although this unequal segmentation of the cyclostoma, ganoids, and amphibiaseems at first sight to differ from the original equal segmentation (forinstance, in the monoxenia, Fig...
Ernst Haeckel 「The Evolution of Man」
...Also the upper and darker hemisphereremains in this position throughout the course of the segmentation, and itscells multiply much more briskly...
Ernst Haeckel 「The Evolution of Man」
...Unequal segmentation takes place in some of the cyclostoma and in the oldestfishes in just the same way as in most of the amphibia...
Ernst Haeckel 「The Evolution of Man」
...Unequal total segmentation follows the same lines in the oldest fishes, theselachii and ganoids, which are directly descended from the cyclostoma...
Ernst Haeckel 「The Evolution of Man」
...When the fertilisation of the bird’s ovum has taken place within themother’s body, we find in the lens-shaped stem-cell the progress of flat,discoid segmentation (Fig...
Ernst Haeckel 「The Evolution of Man」
...57—Diagram of discoid segmentation in the bird’sovum (magnified)...
Ernst Haeckel 「The Evolution of Man」
...But to complete our picture wemust also consider the segmentation or metamera-formation of them, which hasyet been hardly noticed, and which is seen best in the longitudinal section...
Ernst Haeckel 「The Evolution of Man」
...In the genealogical treeof the Vertebrates this palingenetic form of segmentation has been preserved inthe Amphioxus alone, all the other Vertebrates having cenogenetically modifiedforms of cleavage...
Ernst Haeckel 「The Evolution of Man」
...In any case, the latter were developed from the former, andso the segmentation of the ovum in the Amphioxus has a great interest for us(cf...
Ernst Haeckel 「The Evolution of Man」
...This segmentation of the muscles wasthe momentous historical process with which vertebration, and the developmentof the vertebrate stem, began...
Ernst Haeckel 「The Evolution of Man」
...Out of thisagitation arises a little spot, that is usually round, and enlargesprogressively to reach a maximum, after which it diminishes, withfrequent segmentation and shrinkage...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
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