. The chordates. Chordata. too Comparative Morphology of Chordates Atrial cavity Pharynx. Mouth Anus Intestine i Stomach ^•y "SSSS Fig. 310. Doliolum, a free-swimming tunicate. The somewhat diagrammatic figure, taking advantage of the fact that the thin body-wall of the small animal is semitransparent, assumes that the main features of internal structure may be seen through the outer wall. The many branchial slits (stigmas) through which water passes from the pharynx into the atrial cavity are not shown, but are suggested by arrows. The animal's swimming movements are effected by contract
. The chordates. Chordata. too Comparative Morphology of Chordates Atrial cavity Pharynx. Mouth Anus Intestine i Stomach ^•y "SSSS Fig. 310. Doliolum, a free-swimming tunicate. The somewhat diagrammatic figure, taking advantage of the fact that the thin body-wall of the small animal is semitransparent, assumes that the main features of internal structure may be seen through the outer wall. The many branchial slits (stigmas) through which water passes from the pharynx into the atrial cavity are not shown, but are suggested by arrows. The animal's swimming movements are effected by contractions of the circular 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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