AXIAL SKELETON OF THE STRUTHIONIDA. 29 
The fifth vertebra is like the fourth, except that it already displays both metapo- 
physes and catapophyses. 
In the siath vertebra the hyperapophyses begin to blend with the lateral posterior 
portions of the neural spines. 
The remaining cervical vertebre, from the seventh to the fourteenth inclusive, are all 
nearly similar in form, but increasing in size, and with the styloid rib more developed 
as we proceed postaxially. In C. galeatus the more anterior cervical vertebre have a 
ELEVENTH VERTEBRA OF CASSOWARY (natural size). 

Lateral view. Letters as before. 
Jarge perforation in the interzygapophysial ridge; but in all this lamella is very 
conspicuous. 
THE CERVICO-DORSAL VERTEBR. 
The siateenth vertebra (the fifteenth of C. bennettit’) has its parapophysis extended 
preaxiad of the preezygapophysis. There are still two distinct catapophyses. 
In the seventeenth vertebra the catapophyses closely approximate. 
In the eighteenth vertebra the parapophysis is not so much preaxiad of the prezyga- 
pophysis. ‘There is a hypapophysis, which bifurcates from a single root. 
In the nineteenth vertebra the parapophysis is no longer preaxiad of the prezygapo- 
physis. The hypapophysis may bifurcate, or (as in C. bennettii) it may be simple. 
All these four cervico-dorsal vertebre are scarcely shorter relatively than are the 
corresponding ones of Dyomeus, and they are very much more like the latter than 
they are like their homologues in Rhea. The fossa postaxiad to the neural spine, 
however, is much smaller than in Dromeus, especially in the eighteenth and nineteenth 
vertebre. The transverse processes are not so much expanded, axially, at their distal 
ends as they are either in Dromeus or Rhea. 
' To prevent repetition, it may be here remarked, once for all, that C. bennettii has but fourteen cervical 
vertebra, the number of the trunk-yertebra described is always one in adyance of the number of the corre- 
sponding vertebra of C. bennettii. 
