. The biology of the frog . n eitherside of which isa small projection,or condyle. Alarge crest, thedeltoid ridge, ex-tends from the «head of the hume-rus to about themiddle of the ven-tral side. At thedistal end of thehumerus there isa ridge above ,each of the two pcondyles; the in-ner ridge is much larger in the male Fig. 68. — Longitudinal sections of the larger • 1 r 1 of the limbs. A, humerus; B, radio-ulna; C, tnan in tne temale. femur; D> ^, condyle;/ foramen The skeleton for artery; yf, fibula; kd,head; m, marrow; ol. Of the forearm o^cranon; p bony partition;

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. The biology of the frog . n eitherside of which isa small projection,or condyle. Alarge crest, thedeltoid ridge, ex-tends from the «head of the hume-rus to about themiddle of the ven-tral side. At thedistal end of thehumerus there isa ridge above ,each of the two pcondyles; the in-ner ridge is much larger in the male Fig. 68. — Longitudinal sections of the larger • 1 r 1 of the limbs. A, humerus; B, radio-ulna; C, tnan in tne temale. femur; D> ^, condyle;/ foramen The skeleton for artery; yf, fibula; kd,head; m, marrow; ol. Of the forearm o^cranon; p bony partition; ™ radius; sh shaft; ti, tibia; ul, ulna. (After Parker andConsists Of the Parker.) radio-ulna, which arises from the fusion of two origi-nally distinct bones, the radius and ulna, the line ofunion between which is very marked, especially at the distalend. The postaxial or ulnar part is produced backward atits upper end to form the olecranon, which fits over therounded end of the humerus at the joint of the elbow. The.

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