The laws and mechanics of circulation, with the principle involved in animal movement . Fig. 148.—Abdominal Viscera, with Air-Bladder (k) in situ, Herring (reduced).—Brandtand Ratzeburg. Medizinische Zoologie. 4to. 1833. a, CEsophagus ; b, stomach ;c, pylorus ; d, appendices pyloricae ; e, e, intestine ; /, anus ; 7i, h, testes ; i, genitalducts ; k, air-bladder ; I, pneumatic Fig. 149. Superficial and Looped Vessels of the Vaso-Ganglion of the Air-Bladder, Cod.—Dr. Wdliams.

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