337 
. Further dissection of the same parts, with the course of the optic nerve. 
. Dissection of the muscles of the mandible and tongue of Apterya australis. 
eI 
gQ Oy 
wo nO 
Fig. 4. Ligaments and muscles of the mandible of the same. 
Fig. 5. Portion of the trachea of the Cassowary (Casuarius galeatus). 
Fig. 6. Portion of the trachea, including seven tracheal rings of Dinornis (ingens %), 
Fig. 7. Tracheal rings of Aptornis defossor. 
Fig. 8. Stones from the gizzard of Dinornis elephantopus?. 
PLATE XCIILI. 
Fig. 1. Tracheal rings of D. crassus: a, 6, c, varieties, full view; d, oblique view, from 
near the head. 
Fig. 2. Side views of (a) large ring and (4) small ring, showing inequality of depth 
of hoop. 
Fig. 3. Full view of subcircular rings, D. crassus. 
Fig. 4. Group of seven tracheal rings, D. crassus. 
. Group of four tracheal rings, D. crassus: a, front view; 6, side view. 
. Groups of two rings, showing appearance of alternate breadth and narrowness 
of parts of hoop: a, front view; 6, back view; ¢, side view. 
Fig. 8. Part of ossified “ thyroid cartilage” of upper larynx of Dinornis crassus: a, outer 
surface; 6, inner surface. 
Fig. 9. D. crassus: a, part of the chief bone of the lower larynx; 6, ¢, upper bronchial 
ring. 
Fig. 10. Tracheal rings of Dinornis rheides: a, 6, c, varieties, in full view; d, oblique view. 
Fig. 11. Broad variety of tracheal rings, edge views: @, broader side; 6, narrower side. 
Fig. 12. Group of four tracheal rings, D. rheides. 
Fig, 13. Tracheal ring of Dinornis elephantopus (?): a, full view; 4, side view. 
Fig. 14. Broader variety of tracheal ring of the same species. 
Fig. 15. Narrow variety of tracheal rings of the same species: @, full view; 0, side view. 
3 
4 
Fig. 5. Group of five tracheal rings, D. crassus. 
6 
7 
Fig. 
' These pebbles constitute about one-third of the heap of such found within the space encompassed by the 
ribs and sternum of the skeleton of Dinornis elephantopus exhumed from the bog at Glenmark, Canterbury 
Settlement, Middle Island, New Zealand, of which the sternum is described, p. 254, Pl. LXXIT. No such 
pebbles occur, naturally, within a distance of thirty miles of that locality. 
L submitted them to the examination of the experienced officers in the Department of Mineralogy, British 
Museum, and append the following note from Tomas Davies, Esq., Assistant in that Department :-— 
“The pebbles supposed to have been contained in the gizzard of the Dinornis consist exclusively of varieties 
of quartz more or less crystalline or compact—sometimes amethystine, and also approaching in texture and 
colour the black cherty variety called Lydian stone or Basanite ; the two latter, however, are apparently of more 
exeeptional occurrence. All are much worn, preserving little trace of their original fragmentary outline.’ ‘ 
I have received pebbles smoothly rounded by the triturating work of the gizzard of the Dinornss, from other 
localities (Rangiora), under similar relations to the skeleton ; their significance in association with bones of (he 
trunk has probably been overlooked. 
2k 
