DescriptionJournal of morphology (1893) Branchiostoma.jpg Fig. 1. Four-cell stage from the apical pole. 1-1 = First plane of segmentation. 2-2—Second plane of segmentation...
DescriptionJournal of morphology (1893) (14596154188).jpg English: Identifier: journalofmorphol08wist (find matches) Title: Journal of morphology Year: 1893 (1890s)...
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