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Comparative Morphology of Chordates 



Fig. 407. Diagrams of (A) dorsal and (B) ventral aspects of lung of hen. (a) 

 Point of connection of mesobronchus with abdominal air-sac; (ai) region of recur- 

 rent bronchi from anterior intermediate sac; (ai°) connection of anterior inter- 

 mediate sac with bronchus; (b) bronchus; (c) attachment of cervical sac; (d) roots 

 of dorsibronchi ; (ec) ectobronchi; (en) endobronchi; (I) laterobronchi; (Im, m) 

 connections of lateral and mesial moieties of interclavicular sac; (mb) meso- 

 bronchus; (p) connection of posterior intermediate sac; (r) retrobronchi (recurrent) 

 from air-sacs. (After Locy and Larsell. Courtesy, Kingsley: "Comparative Anat- 

 omy of Vertebrates," Philadelphia, The Blakiston Company.) 



r ec 1 



Fig. 408. Diagrammatic side view of bird lung, showing the parabronchi con- 

 necting ecto- and endobronchi. (b) Bronchus; (ec) ectobronchi; (en) endobronchi 

 (o) abdominal orifice, point of connection with abdominal air-sac; (p) parabronchi; 

 (r) impressions of ribs. (After Locy and Larsell. Courtesy, Kingsley: "Comparative 

 Anatomy of Vertebrates," Philadelphia, The Blakiston Company.) 



