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nexion with the tibia, and proportions almost as massive and robust as the fibula of 
Dinornis, like which genus, Gastornis will probably prove to be tridactyle and terrestrial. 
It is possible (one cannot venture to say more) that the cranial fragment here described 
may belong to the same genus as the Parisian eocene large bird’. 
DESCRIPTION OF THE PLATES. 
PLATE LXXyV. 
Dinornis rheides. 
Fig. 1. Side view of skull. 
Fig. 2. Back view of cranium. 
Fig. 5. Top view of cranium. 
Fig. 4. Base view of cranium. 
Fig. 5. Top view of mandible. 
Fig. 6. Back view of left ramus of mandible. 
Fig. 7. Inner view of left ramus of mandible. 
Fig. 8, Inner view of right zygomatic arch. 
Fig. 9. Outer view of right tympanic. 
Fig. 10. Inner view of right tympanic. 
PLATE LXXYVI. 
Dinornis crassus. 
Fig. 1. Side view of skull. 
Fig. 2. Upper view of skull. 
Fig. 8. Under view of skull. 
Fig. 4. Back view of cranium. 
Fig. 5. Inner surface of tympanic. 
Fig. 6. Outer surface of tympanic. 
Fig. 7. Inner surface of mandibular ramus. 
Fig. 8. Under view of mandibular ramus and symphysis. 
Fig. 9. Upper view of mandibular ramus and symphysis. 

‘In the Memoir quoted by M. Alphonse Milne-Edwards, the following ‘ Rapports’ between Guslornis oan 
Dinornis are thus indicated :-—* Interesting, unquestionably, is the median position of the supratendinal bridge 
in Gastornis ; and it would indicate affinities to the Swan and Goose, were not the same bridge equally medianly 
situated in the Gallinule, the Notornis, the Raven, some Accipitrine birds,” &. “ a incknation of ae ee 
to the inner side, and the position of the lower outlet to the left of the median plane, _ vite Tee 6 : 
departure from the Anserine type, is an approximation to the Gallinaceous and Dinornithic alee 
Quarterly Journal of the Geological Society, vol. xii. p. 215. And, again, “In the aspect of the lower cae 
the tendinous canal the Gastornis more resembles the known larger wading and land birds and es On . a 
than it does any aquatic bird.”—J0. p.216. “The proportions of the tibia, its thickness ¢. g- a aE 
its length, would plainly show that the Parisian eocene bird had more robust and eae oh i .. - 
waders, and probably was, as other birds of like dimensions, better adapted for terrestrial life."-—£°. P- 

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