. A manual of elementary zoology . Zoology. THE LANCELET 327 the left side of the ventral fin where it passes into the caudal. Behind it is a region of the body of some length. ^^ssgS Fig. 233.—Amphioxus, from the left side, with the atrial floor 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 Borradaile, L. A. (Lancelot Alexander), 1872-1945. London : H. Frowde, Hodder & Stoughton

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Keywords: ., bookcentury1900, bookdecade1920, booksubjectzoology, bookyear1920