. Fig. I. The lung and air sacs, a, stage 25; b, stage 31; c, stage 37; d, stage 34. a, b, r, and d, diagrams of the right lung drawn from the right side; e, the same lung as d, dorsal view. ab, abdominal air sac; «?//, anterior thoracic air sac; ce, cervical air sac; do, dorsal papilla; ecb, ectobronchus; enb, entobronchus; id, interclavicular air sac; mb, mesobronchus; pa, pulmonary arterj^; pb, parabronchus; pth, posterior thoracic air sac; st, systemic artery. The external auditory meatus takes on the adult appearance. All traces of the visceral openings on the neck have vanished. The inte
. Fig. I. The lung and air sacs, a, stage 25; b, stage 31; c, stage 37; d, stage 34. a, b, r, and d, diagrams of the right lung drawn from the right side; e, the same lung as d, dorsal view. ab, abdominal air sac; «?//, anterior thoracic air sac; ce, cervical air sac; do, dorsal papilla; ecb, ectobronchus; enb, entobronchus; id, interclavicular air sac; mb, mesobronchus; pa, pulmonary arterj^; pb, parabronchus; pth, posterior thoracic air sac; st, systemic artery. The external auditory meatus takes on the adult appearance. All traces of the visceral openings on the neck have vanished. The intestine is thrown into two spirals completely enveloping the rudiments of the pancreas. The spleen de- velops on the omphalo-mesenteric artery.
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
