138 
Fig. 8. Os tympanicum of Struthio camelus. 
9. Os tympanicum of Apteryr australis. 
a. Anterior or orbital process. 
b. External or zygomatic process. 
e. Inferior or mandibular articular surface. 
PLATE XXXII. 
. Side view of an upper or anterior cervical vertebra of Dinornis ingens. 
. Front view of the same vertebra. 
. Upper view of the same vertebra. 
. Side view of an upper or anterior cervical vertebra of Dinornis giganteus. 
. Upper view of the same vertebra. 
a. Anterior articular surface of the body. 
n. Neural canal. 
pl. Pleurapophysis, or anchylosed cervical rib. 
s. Rudiment of spinous process. 
v. Canal for vertebral artery. 
z. Prezygapophysis, or anterior oblique or articular process. 
z'. Postzygapophysis, or posterior do. do. 
Fig. 
ob ww We 
PLATE XXXIII. 
Fig. 1. Side view of an inferior cervical vertebra of Dinornis giganteus. 
2. Front view of the same vertebra. 
3. Under view of the same vertebra. 
a. Anterior articular surface of the body. 
a’. Its continuation upon the lower part of the body. 
c. Parapophysis, or lower transverse process, from the body of the vertebra. 
d. Diapophysis, or upper transverse process, from the neural arch. 
e. Prezygapophyses. 
J. Postzygapophyses. 
g. Superior or neural spine. 
h. Inferior or hemal spine. 
7. Pneumatic orifice. 
Side view of ungual phalanx or claw-bone of a large species of Dinornis. 
Upper view of the same phalanx. 
. Back view or articular surface of the same phalanx. 
an 
os 
PLATE XXXIV. ’ 
Fig. 1. Side view of a dorsal vertebra of Dinornis crassus. 
2. Front view of the same vertebra (minus the spine). 

