162 PROFESSOR OWEN ON THE GENUS DINORNIS. 
The muscular system, as has been shown in Apteryz, is correspondingly developed '; 
and when, to the proportionably still more powerful neck-muscles in Dinornis, were 
added their thick integument and covering of feathers, the neck must have been a 
feature of strength very different from the slender character of that lengthy part in an 
Ostrich and the like living birds. 
FIFTEENTH VERTEBRA, Dinornis giganteus (3 nat. size). 
Fig. 22. Fig. 23. 

Aspects. 
Fig. 22, lateral; 23, neural; 24, heemal. 
This consideration adds significance to the record of one of the oldest living colo- 
nists in New Zealand, recently published. 
* Trans. Zool. Soc. vol. iti. p. 288 et seg. pls. 31-35. 
