. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MESODERM EPIDER MAL ECTODERM NEURAL ECTODERM NOTO CHORD PRE-CHORDAL PLATE DORSAL BLASTOPORAL LIP Fig. 181. Presumptive organ-forming areas of the blastoderm of the trout, Salmo irideus. (A) Schematized section through blastoderm just previous to gastrulation. Pre- sumptive entoderm (hypoblast) shown in black at caudal end of the blastoderm. Observe that entoderm is not exposed to surface. Cf. (B). (B) Surface view of presumptive organ-forming area
. Comparative embryology of the vertebrates; with 2057 drawings and photos. grouped as 380 illus. Vertebrates -- Embryology; Comparative embryology. MESODERM EPIDER MAL ECTODERM NEURAL ECTODERM NOTO CHORD PRE-CHORDAL PLATE DORSAL BLASTOPORAL LIP Fig. 181. Presumptive organ-forming areas of the blastoderm of the trout, Salmo irideus. (A) Schematized section through blastoderm just previous to gastrulation. Pre- sumptive entoderm (hypoblast) shown in black at caudal end of the blastoderm. Observe that entoderm is not exposed to surface. Cf. (B). (B) Surface view of presumptive organ-forming areas of the blastoderm just before ^^cy^^ Fig. 182. Late blastoderms of Gymnophiona. (Modified from Brauer, 1897.) (A) Late blastoderm of Hypogeophis alternans. Entoderm cells in black lie below. (B) Be- ginning gastrula of H. rostratus. Observe blastocoelic spaces in white between the ento- derm cells. 369. 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 Nelsen, Olin E. (Olin Everett), b. 1898. New York, Blakiston
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, bookleafnumber395
