. A manual of elementary zoology . Zoology. THE DOGFISH 35i a gill on each side of each cleft except the last, which has no gill on the hinder side. The spiracle is a small cleft of the same series as the gill cleft, and bears on its front side a vestige. 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