PROFESSOR OWEN ON THE GENUS DINOBNIS. 239 
of short, compressed processes, which may be distinguished, gradually subsiding and 
diverging, to the fourteenth, where they appear as a forward projection from the rising 
of the neural arch, which expands and projects as the postzygapophysis. A short 
mesial prominence, like a rudimental neural spine, intervenes in the twelfth and 
succeeding cervicals between the bases of the lateral homologues of the bifid spine in 
the fifth to the eleventh vertebre. But these homologues increase in size and height 
of the intervening part from the fourteenth to the nineteenth vertebre are represented 
in the twentieth by a pair of low tuberosities on the summit of a subquadrate strong 
process 8 lines in anterior height, while in the twenty-first vertebra the spine assumes 
in its loftier and subcompressed form the longer and larger, superiorly truncate neural 
spines of the free dorsals. 
The cervical vertebre very gradually increase in size from the fifth to the ninth, but 
show scarcely an appreciable increase of size in the four following, beyond which they 
gradually, as before, gain in size to the twenty-first vertebra. 
As compared with the third cervical in Dinornis maximus*, the centrum beyond the 
pleurapophysial processes is shorter and broader, and has no hypapophysis. The 
hyperapophyses are relatively lower, and the neural spines shorter; the interzygapo- 
physial foramina are present, but are relatively smaller. In the sixth cervical the 
shorter and broader proportions of the hind half of the centrum are well marked. 
The parial hypapophyses commence as low tubercles from the parapophyses of the 
seventh cervical, as in the sixth of D. maximus*, and gain in size, as the pleura- 
pophyses do in length, in the succeeding cervicals as far as the thirteenth. In the 
sixteenth cervical the lengthened hypapophyses converge, but do not meet; in D. 
maximus they diverge from an almost common base. In the following cervicals they 
are represented by a single median subcompressed process. Both the twentieth and 
twenty-first cervicals resemble the last (fifteenth) in the subject of Dinornis maximus 
described and figured in the undercited memoir’®. 
The base of the hypapophysis in D. parvus is not extended lengthwise as a low ridge, 
nor is it so circumscribed or relatively so small as in D. giganteus ; but the pair of low 
tuberosities mark here, as in the huge species‘, the hind border of the lower surface 
of the centrum. The interzygapophysial ridge ceases in the nineteenth cervical of 
D. parvus. The pneumatic foramen is present beneath the zygapophysial expanse 
of the neural arch in the eight hinder cervicals. A tuberous metapophysis is developed 
from the diapophysial part of the costal or lateral arch in all the cervicals beyond the 
seventh. The parapophysis rises external to the preaxial articular surface in the fifth 
and following cervicals. The articular surface of the postzygapophysis begins to change 
a downward for a lateral aspect at the sixteenth vertebra, the change increasing to the 
last cervical. 
1 Loc. cit. p. 152, figs. 8-11. 
3 Loe. cit. p. 159, figs. 18, 19. 
? Loe. cit. p. 155, fig. 14. 
+ Loc. cit. p. 162, fig, 24. 
