No. 406.] 
keen for avian resemblances, 
and he at once noted that 
the ilium of Megalosaurus 
was bird-like. In fact, 
Phillips had previously 
noted the resemblance of 
this bone to that of Apteryx. 
Stimulated to further 
comparison, Huxley (69, 
pp. 15 f.) observed other 
avian features, vis., that the 
ischium of dinosaurs ex- 
tends back parallel with the 
ilium ; that the. pre-acetabu- 
lar process, or pubic pedun- 
cle of the ilium, extends 
further downward than the 
post-acetabular, or ischial 
peduncle; that the acetabu- 
lum itself is partly open; 
that the limb bones are 
distinctly tubular; that the 
scapulo-coracoid elements 
are anchylosed together ; 
that the sacrum is partly 
ornithic, partly reptilian ; 
that the femur is vertical 
to the body, its head ex- 
tending outward into the 
acetabulum ; that the tibia 
possesses a prominent pro- 
cnemial crest ; that the as- 
tragalus embraces the lower 
end of the tibia. Huxley 
concluded (68) * there could 
be no doubt that the hind 
quarters of Dinosauria 
wonderfully approached 
DINOSAUR-A VIAN STEM. 
779 
Fic. 2. — Pelvic arch of left side, dinosaurs and birds. 
osau 
A, carnivorous dinosaur (All Tus), triradiate 
fa 
rotated backwards, after Gegenbaur , iguano- 
dont dinosaur, vestigial postpubis, Loin 
type, after Marsh. 
