PHYLOGENY OF THE PALZOGNATHA AND NEOGNATH. 279 
b. Toes two in number ; tarso-metatarsus far exceeding the femur in length. 
¢c. Ectocnemial crest small, a mere tubercle on procnemial ; fibula extending 
to level of proximal tarsal mass; extensor groove obsolete; a deep ento- 
condylar pit continued backwards into a groove; the lateral ventral 
border of ento- and ecto-condyles continued backward and upward to 
project spur-wise from the shaft. ©... + - + + + + ee ee Struthio. 
c. Toes four; tarso-metatarsus short. 
d'. Extensor bridge wanting. 
c!, Femur long and slender; tibio-tarsus with a deep intercondylar gorge ; 
entocondyle very large, projecting conspicuously in front of shaft in 
lateral view ; none of the phalanges conspicuously shortened . . . Apteryz. 
d@!, Femur very short and thick, with enormous great trochanter; tibio- 
tarsus without intercondylar gorge, ento- and ecto-condyles not being 
clearly distinguishable: Ph. 2. D. I. short ; Ph. 2, 3, 4. D. IV. short. pyornis. 
é. Extensor bridge present; femur short ; ento-condyle of tibio-tarsus large, 
resembling that of Apteryr . . 2. . 6 + + ee + « + + ~ + Dinornithide. 
List or WoRKS REFERRED TO OR CONSULTED. 
. Aurx, P. H. E.—Syrinx of Rhea. Bull. Soc. Philomat. 1874, p. 38. 
2. Axuis, T.—On the Skeleton of the Apteryz. Journ. Linn. Soc., Zool. xi. 1873, p. 523. 
7 
8 
. Anprews, C. W.—Note on a complete Skeleton of Apyornis from Madagascar. Geol. Mag. 
vol. iv. 1897, p. 241. 
. Anprews, C. W.—On the Skull, Sternum, and Shoulder-girdle of Apyornis. Ibis, 1896, 
p- 376. 
. Bepparp, F. E.—On the Heart of Apteryx. Proc. Zool. Soc. 1885, p. 188. 
. Bepparp, F. E.—On the Alimentary Canal of the Martineta Tinamou. Ibis, 1890, vol. iil. 
pp- 61-66. 
. Bepparp, F. E.—The Structure and Classification of Birds. 1898. 
. Bepparp, F. E.—Notes on the Anatomy of the Genus Apteryx. Novitates Zoologice, 
vol. vi. 1899, pp. 386-402. 
Bepparp, F. E. and Mrrcuett, P. C.—On the Structure of the Heart of the Alligator, Proc. 
Zool. Soc. 1895, pp. 343-349. 
. Brumensacn, J. F.—Abbildung. naturhistor. vol. viii. 
EI, 
12, 
Borcxinc, A.—De Rhea americana. Diss. Inaug. Bonn, 1863. 
Burcxnarpt, R—Ueber Mpyornis. Paleontol. Abhandl. neue Folge, Bd. ii. Heft 2 (Jena, 
1893). 
. Cunnincnam, R. O.—Notes on some Points in the Osteology of Rhea americana and Rhea 
darwini. Proc. Zool. Soe. 1871, p. 105. 
2Q2 
