500 
Figs. 6, 
DR. R. O, CUNNINGHAM ON THE ANATOMY 
PLATE LIX. 
7, 8. Cranium of adult Wicropterus, from above, from the side, from beneath. 
Lettering the same in all: So, supraoccipital; Ho, exoccipital; Mm, foramen 
magnum ; Of, occipital fontanelle ; Qf, fossa for articulation with quadrate ; 
Bs, basisphenoid; Bp, facette for articulation with pterygoid; pop, post- 
orbital process; aop, anteorbital process; g/, glandular depression of frontal ; 
Pa, parietal; Pl, palatine; Vo, vomer; EF, ethmoid; L, lachrymal; J/j, jugal 
process of maxillary; J, groove for olfactory; V, foramen for trigeminal. 
(The quadrate, pterygoid, quadrato-jugal, and jugal bones are not figured in 
figs. 7 & 8.) 
Fig. 9. Right jugal. 
Fig. 10. Left quadrato-jugal. 
Figs. 11 & 12. Cranium of adolescent flying bird, from above, and from the side: 
Sq, squamosal ; As, alisphenoid. The remaining letters as in figs. 7 & 8. 
Figs. 13 & 14, Cranium of unfledged birds, from above, and from the side: @, quadrate ; 
Fig. 15. 
Qj, quadrato-jugal; J, jugal; N, nasal; J/, maxillary; Jim, intermaxillary ; 
Pt, pterygoid. The remaining letters as in figs. 7 & 8, 
Left quadrate of adult Steamer Duck: a, outer; 4, inner side; 0, orbital 
process. 
5. Left pterygoid of adult bird: a, from beneath; 6, from above. 
. Vomer of adult, from left side: @, upper margin. 
PLATE LX. 
. Occiput of adult: Oc, occipital condyle; Of, occipital fontanelle; 2m, foramen 
magnum. 
. Transverse vertical section of cranium of adult, to show the exit of the orbital 
nerves: J, olfactory foramen; JJ, optic; V, ophthalmic. 
. Occiput of unfledged bird: So, Supraoccipital; P, parietal; Sg, squamosal ; 
Eo, exoccipital; Of, occipital fontanelle ; /m, foramen magnum ; Oc, occipital 
condyle; Bo, basioccipital. 
. Left periotic of unfledged bird: VJJ, notch for seventh nerve. 
. Left squamosal of unfledged bird. 
. Ethmoid of unfledged bird: a, from the side; 4, from above. 
Figs, 24 & 25. Basisphenoid of ditto, from beneath and abvve: Lt, combined basi- 
i 
fa da da de de 
© bo Dw bo Ww 
Oo oO =-] & 
i=) 
temporals; s, sella turcica, 
. Right parietal of ditto. 
. Right frontal of ditto. 
. Right nasal of ditto, 
. Right maxillary of ditto. 
. Intermaxillary of ditto, from above. 
