The fine structure of the stomochord of the enteropneusts Harrimania kupfferi and Ptychodera flava.
D000818:Animals; D005075:Biological Evolution; D002816:Chordata, Nonvertebrate / Q000166:cytology / Q000196:embryology*; D004625:Embryo, Nonmammalian / Q000166:cytology*; D004847:Epithelial Cells; D008854:Microscopy, Electron; D009413:Nerve Fibers, Myelinated