Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 170 MEANIXO OF THE SYSTEM. developed wings (Ichthyomis). Others (Odontolcce) had teeth FIG. Hi).—Archa-ojit ryj: lithtgraphiea. bedded in pits, normal vertebrae, no keel to the breast-bone, and rudimentary wings. They were not capable of flight

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