320 ON THE OSTEOLOGY OF THE FALCONIFORMES. [Apr. 15. 



Plate XXXII. 



Fig. 1. Dorsal aspect of sknll of Catharistes uruhu, sliowing the absence of orbital 



processes to the lachrymals and the imperfect nasal hinge. 

 Fig. 2. Dorsal aspect of skull of Serpentarius se.r']pentarms, showing the large 



orbital processes of the lachrj'mals and their relation to the frontals. 

 Fig. 3. Dorsal aspect of the skull of jButeo jalcal, showing the large, outstanding 



orlntal processes and the superciliary plate. 

 Fig. 4. Dorsal aspect of the skull of Faico minor, showing the large outstanding 



orbital processes of the lachrymal and the alisence of a superciliary plate. 

 Fig. 5. Dorsal aspect of the skull of Pandion Jialiaetus, showing the absence of 



orbital processes to the lachrymal. Compare this fig. with the skull of 



Catharistes, fig. 1, and note that in Pandion the lachrymal appears on the 



surface of the skull. 

 Pig. 6. Dorsal aspect of the. skull of MicroMerax, to show the nasal hinge. 

 Fig. 7. Lateral aspect of the skull of Ilicroliierax fi-inffillarius, to show the nasal 



hinge. 

 Fig. 8. Lateral aspect of the skull of Falco minor, to show the relation of the 



lachrymal to the antorbital plate (prefrontal) and the shape of the 



nostril. 

 Fig. 9. Lateral aspect of the lachrymo-nasal region of Pandion haliaetiis, to show 



the fusion of the lachrymal with the antorbital plate. 

 Fig. lO. Lateral aspect of the lachrymo-nasal region of Serpentarius serpentarius, 



to show the relation of the lachrymal to the antorbital plate, and the great 



size of the antrum of Highmore. 



a.p. = antorbital plate. 



I. = lachrymal. 

 ii.h. = nasal hinge. 



s. = superciliary plate. 

 or.l. = orbital process of lachrymal. 



Plate XXXIlI. 



Fig. 1. Lateral view of the upper jaw of Hierofalco ffj/rfalco, showing the gradual 



suppression of the vertical bullate portion of the maxillo-palatine by the 



increasing development of the anterior olfactory chamber (vestibulum 



externtis). 

 Fig. 2. Lateral view of the upper jaw of Harpa australis, showing the more 



primitive condition of the vertical bullate portion of the maxillo-palatines 



in the Falconince. 

 Fig. 3. Lateral view of the upper jaw of Milvago cJilmachima , showing the more 



primitive condition of the bullate portion of the maxillo-palatines in the 



PolyhorincB. 

 Fig. 4. Lateral view of the upper jaw of Herpetotkeres cachinnans, showing the 



maximum development of the bullate portion of the maxillo-palatines 



reached by the Falconince. 

 Fig. 5. Lateral view of the upper jaw of Ihyctev ater, showing the maximum 



development of the bullate portion of the maxillo-palatines reached by the 



Palconince. 

 Fig. 6. Dorsal aspect of the palatal bones of a young Pernis apivorus, to show 



the hemipterygoids. 

 Fig. 7. Lateral view of the palatal bones of a young Pernis apivorus, to show the 



relation of the hemipterygoid to the vomer. 

 Fig. 8. Lateral view of the lachrymo-nasal region of the skull of Psopliia, after 



removal of the lachrymal and part of nasal, to show the septo-maxillary 



spurs and their relation to the maxillo-palatines and nasal septum. 



h.pt. = hemipterygoid. 

 mx.p. = maxillo-palatine. 

 M.S. = nasal septum. 

 v.e. = vestibulum cxternus. 

 vo, = vomer. 



