. Text book of zoology. Zoology. Pig. 301. A skull and visceral arches of a Shark, B the same of a Pike; the arches are in part artificially separated; premaxiUa and maxilla separated in B. First arch dotted, second shaded: br^—br^ first to fifth branchial bars (third—seventh visceral arches), c basibranc-hials, d dentary, g palato-qnadrate, gb palatine, hm upper portion of the hyoid arch (in B hyomandibular), h rest of the same, h mandible, o orbit, g quadrate, s symplectic, V—v" pterygoids (v ecto-, v' endo-, v" metapterygoid).—Orig. hyoid).* In the G-anoidei, Dipnoi, and Teleostei
. Text book of zoology. Zoology. Pig. 301. A skull and visceral arches of a Shark, B the same of a Pike; the arches are in part artificially separated; premaxiUa and maxilla separated in B. First arch dotted, second shaded: br^—br^ first to fifth branchial bars (third—seventh visceral arches), c basibranc-hials, d dentary, g palato-qnadrate, gb palatine, hm upper portion of the hyoid arch (in B hyomandibular), h rest of the same, h mandible, o orbit, g quadrate, s symplectic, V—v" pterygoids (v ecto-, v' endo-, v" metapterygoid).—Orig. hyoid).* In the G-anoidei, Dipnoi, and Teleostei, there are also seven visceral arches. The upper portion of the man- dibular arch, the palato-quadrate, naeets its fellow of the other side in the cartilaginous Ganoids, whilst in all others it remains distinct. This portion is intimately connected below, with the lower end of the upper portion of the hyoid arch, which is * As regards visceral arches, the Bays, on the whole, resemble the Sharks, but the hyoid shows certain peculiarities, which cannot be gone into more closely here. In many Sharks there are anteriorly, close to the gill-bars of each side, a pair of feebly- developed cartilaginous bars (the labial cartilages), which may perhaps be regarded as rudimentary first visceral 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 Boas, J. E. V. (Johan Erik Vesti), 1855-1935; Boas, J. E. V. (Johan Erik Vesti), 1855-1935. Lehrbuch der Zoologie. London, Sampson Low, Marston
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1896
