. Text-book of embryology. Embryology. Fig. 80a.—Sagittal sections through Polypterus. F, stage 2(j; G, stage 29; H, stage 32. a, anus; , anterior commissure; vh, optic chiasma; I, cloaca ; ent, enteric cavity ; H, heart; , habenular commissure ; li, liver; , mandibular ridge ; p, pituitary involution ; ,.posterior commissure ; , postanal gut; pan, pancreatic rudiment; pin, pineal rudiment; st, stomach ; y, yolk. It is of interest to notice that in various Vertebrates the buccal opening is at first elongated in an antero-posterior direction instead of from side to s
. Text-book of embryology. Embryology. Fig. 80a.—Sagittal sections through Polypterus. F, stage 2(j; G, stage 29; H, stage 32. a, anus; , anterior commissure; vh, optic chiasma; I, cloaca ; ent, enteric cavity ; H, heart; , habenular commissure ; li, liver; , mandibular ridge ; p, pituitary involution ; ,.posterior commissure ; , postanal gut; pan, pancreatic rudiment; pin, pineal rudiment; st, stomach ; y, yolk. It is of interest to notice that in various Vertebrates the buccal opening is at first elongated in an antero-posterior direction instead of from side to side. Such is the case with Scyllium (Sedgwick, see Fig. 81) and Torpedo amongst Elasmobranchs. In these cases the slit-like mouth is bounded on each side by a longitudinal Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original MacBride, E. W. (Ernest William), 1866-1940; Kerr, John Graham, 1869-; Heape, Walter, 1855-1929. London : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpubli, booksubjectembryology
