DEVELOPMENT OE THE SKTJLL OP THE COMMON FOWL. 
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Fig. 10. End view of skull. X 2 diameters. 
Fig. 11. Front view of skull, x 2 diameters. 
PLATE LXXXVI. 
Ninth Stage (continued). 
Figs. 1-9. Sections through nasal region, x 4 diameters. 
Fig. 10. Vertical section of nasal region. X 1-| diameter. 
Fig. 11. The same region, from above. X 1| diameter. 
Figs. 12 & 13. Sections of pterygoid. X 200 diameters. 
Fig. 14. Section of skull. X 1-| diameter. 
Fig. 15. Skull seen from above. X 1^- diameter. 
PLATE LXXXVII. 
Ninth Stage (continued). 
Fig. 1. Side view of skull. X 1| diameter. 
Fig. 2. Horizontal section of skull, upper view. X 1^ diameter. 
Fig. 3. Stapes, lateral and basal views. X 6 diameters. 
Tenth Stage . — Old Fowls. 
Fig. 4. Side view of skull. X 1§ diameter. 
Fig. 5. Basal view of skull. X 1|- diameter. 
Fig. 6. Upper view of skull. X 1^ diameter. 
Fig. 7. Posterior view of skull. X 1^ diameter. 
Fig. 8. Sectional view of skull, x 1-^ diameter. 
Fig. 9. Side view of skull with auditory structures exposed. X 2^ diameters. 
Fig. 10. Lower view of part of nasal septum, x 2 diameters. 
Fig. 11. Os hyoides. X !-§■ diameter. 
