496 



EXPLANATION OF PLATES. 



Plate XIII. Digestive Organs of Cantatores. Half size. 



In all the Figures, the tongue is marked a ; the oesophagus, bed; proventriculus, 

 c d : stomach, e ; intestine,/"^ A t\;; coeca, ?,- cloaca,,;. 



Fig. 1. Dipper. 

 Fig. 2. BlachUrd. 

 Fig. 3. Ring Ouzel. 

 Fig. 4. Shore Lark. 

 Fig. 5. Pied Wagtail. 



Fig. 6. Hedge Chanter. 

 Fig. 7. Nightingale. 

 Fig. 8. Blackcap. 

 Figs. 9, 10, 11. Blue Tit. 

 Fig. 12. Coal Tit, 



