288 ME. \V. p. PTCEAFT ON THE MOEPHOLOGT AND 



Fig. 4. Lateral aspect of a portion of the skull of Casuarius sclateri, showing the 



frontal, nasal, and median elements of the casque. 

 Fig. 4 f/. Dorsal aspect of fig. 3 a. 

 Fig. 4 h. Dissection of a skull of Casuarius sclateri^=fi.g. 3 a, showing the mesethmoid 



and a portion of the ventral border of the median ossification of the 



casque interpolated between the mesial border of the anterior ends of the 



frontal. 

 Fig. 5. Lateral view of the synsacrum of a young Casuarius unapjyendiculatus after 



removal of the right innominate, to show the great height of the neural 



spines of the verlcbrfe. 

 Fig. 6. Lateral view of the synsacrura of an embryo Drommis novce-hollandia; (p. 212), 



prepared for comparison with fig. 5. Note that at this stage the neural 



spines have not yet risen above the centra of the vertebrae, but form only a 



series of lateral wings. 

 Fig. 6 a. Dorsal aspect of a portion of the synsacrum (fig. G), to show more clearly 



that the neural spines do not rise above the centra as in the adult 



condition (fig. 5). 

 Fig. 6 b. Lateral view of the same pelvis (fig. 6), to show the separate elements 



of the innominate. 



Additional Letters. 



a/ii. = anti-trochanter. 

 /.c. = troutal moiety of casque. 

 il. = ilium. 

 ?7.w./. = ilio-iscliiaclic foramen. 



js. = ischium. 

 II). l-6 = himbar vertebne 1-G. 

 lb. l-2 = lumbo-sacral vertebrse 1-2. 

 »ne.c. = median element of casque. 

 ?(.c. = nasal element of casque. 

 o6. = obturator fissure. 



o.yy./r. = orbital process of frontal. 



/>.=pubis. 



/).;3. = pectineal process. 



jmbo-isch.f. = pubo-iscbiadic fissure. 



s.c. = sacral vertebrae 1-2. ] 



s.cd. = sacro-caudal vertebrae. ^ ' , 



, . vertebrae. 



s.M. = sacro-thoracic ,, } 



v. = vestigial thoracic rib. 



«.»ie. = ventral border of mesethmoid. 



PLATE XLV 



Fig. 1. The buccal cavity of Eltea aiiiericana (p. 248), to show the large choan^ 

 characteristic of the Falceofjnatlim. 



Fig. 2. A neossoptile of Calodromas elcgans (p. 162), after Pycraft, to show the large 

 aftershaft, equalling the main shaft in size, the complex rami of the main 

 shaft, and their production forwards into horny filaments resembling the 

 grooved ribbon-shaped bands of the young Ostrich (fig. 7). 



Fig. 2 «. A radius from the distal end of the main shaft. 



