. The chordates. Chordata. LARVAL UROCHORDATE /DORSAL NERVE. ANUS POST OPENING OF PERIBRANCHIAL CAVITY B. CEPHALOCHORDATE ,DORS. NERVE CORD. 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 Rand, Herbert W. (Herbert Wilbur), 1872-1960. Philadelphia : Blakiston

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