OF GALLINACEOUS BIRDS AND TINAMOUS. 241 
PLATE XL. 
Tinamus robustus. 
(Figs. 1-3 magnified 2 diameters.) 
Fig. 1. Basal view of skull. 
Fig. 2. Upper view of skull. 
sro. Superorbital chain of ossicles. 
Fig. 3. Side view of skull. 
eth. Vertical ethmoid. 
io.s. Interorbital space. 
p.o. Post-frontal bone. 
Fig. 4. Front view of tarso-metatarse : nat. 
size. 
Fig. 5. Posterior view of tarso-metatarse : 
nat. size. 
Fig. 6. Articular surface of mandible: 2 
diam. 
Fig. 7. End view of mandibular rami: 2 
diam. 
PLATE XLI. 
Tinamus robustus. Nat. size. 
Fig. 1. Lower view of sternal apparatus. 
Fig. 2. Coracoid and furculum (side view). 
Fig. 5. Pelvis and caudal vertebra (upper 
view). 
Syrrhaptes paradoxus. Nat. size. 
Fig. 4. Sternal apparatus (lower view). 
Fig. 5. Pelvis, and dorsal and caudal verte- 
bree (upper view). 
Fig. 6. Tarsometatarse (front view). 
Fig. 7. Tarsometatarse (posterior view). 
Fig. 8. Foot (lower view) : 2 diam. 
Perdixz cinerea. Nat. size. 
Fig. 9. Sternum (lower view). 
Fig. 10. Sternum (side view). 
PLATE XLII. 
Rhea americana. Nat. size. 
Fig. 1. Basal view of skull. 
f.m. Foramen magnum. 
p-pt. Posterior pterygoid process. 
a.pt. Anterior pterygoid process. 
eu. Kustachian tube. 
’ r.bs. Rostrum of basisphenoid. 
Fig. 2. Upper view of skull. 
n.px. Nasal process of premaxillary. 
Fig. 3. End view of skull. 
ep. Epiotic (Huxley). 
op. Opisthotic (Huxley). 
Fig. 4. Side view of skull. 
os. Orbito-sphenoid. 
m.s. Membranous space between upper 
turbinals. 
ao. 1. Upper antorbital. 
ao. 2. Lower antorbital. 
s.n. Septum nasi. 
Fig. 5. Articular surface of mandible. 
Fig. 6. End view of mandible. 
