376 PROFESSOR OWEN ON THE GENUS DINORNIS. 



of any terrestrial mammals, and to owe its present examples of the class to the ' faithful 

 dog' which originally accompanied the Maori, and to the attendant herds and murine 

 vermin that have been subsequently introduced by European voyagers and colonists. 



In conclusion, it only remains for me to repeat my acknowledgments to Dr. Mantell 

 for his prompt and hberal accordance to me of the valued privilege of examining and 

 describing these rare and interesting remains : and I beg again to express the high sense 

 of the scientific value of the labours by which his intelligent and enterprising son has 

 made so great an addition to our materials for developing the Natural History of New 

 Zealand. 



I have much pleasure also in expressing my acknowledgments to Mr. Gould and 

 Mr. Bartlett, for their kind transmission to me of skins of the Nestor and Porphyria in 

 aid of the comparisons of which the results have been detailed in the foregoing pages. 



DESCRIPTION OF THE PLATES. 



PLATE LII. DiNORNis. 



Fig. 1. Side view of the cranium and upper mandible of Dinornis (probably D. 

 casuarinus). 



2. Upper view of ditto. 



3. Under view of ditto. 



4. Back view of ditto. 



5. Front view of the cranium, showing the surface from which the beak had 



been broken off. 



6. An obhque view of the hinder part of the cranium, showing the two ridges 



of the downwardly developed basioccipital (i") and basisphenoid (s'), and the 

 anchylosed stylohyal (38). 



7. Inner surface of part of the cranium with the pedunculate condyle (i). 



8. Under view of the cranium of the Bustard {Otis tarda). 



9. Obhque view of the hinder part of the same cranium, showing the ridges of 



the basioccipito-sphenoid answering to those in Dinornis. 



PLATE LIII. 



Fig. 1 . Back part of ramus of lower jaw of a large Dinornis or Palapteryx. 



2. Upper view of ditto. 



3. Back view of expanded end of ditto. 



4. Upper view of lower jaw of an Ostrich {Slruthio Camelus). 



5. Side view of ditto. 



6. Back view of expanded end of ditto. 



