348 



MR. W. K. PARKER ON THE OSTEOLOGY OF BALyENICEPS REX. 



EXPLANATION OF PLATES. 



PLATE LXIV. 



Figures of male Bal^niceps rex from the living bird in the Zoological Gardens. 



PLATE LXV. 



Skull of Bal^niceps rex (Nat. size). 



Fig. 1. 



pro 



fo- 



ep. 



P- 

 fr. 



tf. 

 sq. 



Pf- 

 tr. 



op. 

 as. 

 pt. 

 bs. 



OS. 



psp. 

 of- 



I. 



n. 

 npg. 



pmx. 



Side view of skull. 



Par-occipital process. 



Passage leading to the fenestra 

 ovalis. 

 Upper mastoid eminence. 

 Epiotic eminence. 

 Parietal. 

 Frontal. 



Temporal fossae. 

 Squamosal. 

 Post-frontal. 

 Passage for trigeminal nerve — 



foramen ovale. 

 Optic foramen. 

 Ali-sphenoid. 

 Petrosal. 

 Basi-sphenoid. 

 Orbito-sphenoid. 

 Pre-sphenoid'. 



Groove for the olfactory nerve. 

 Lacrymal. 

 Nasal. 

 Nasal passage. (The dotted line 



is on the septum.) 

 Pre-maxillary. 



eth. Ethmoidal or anterior margin of 

 pre-sphenoid of Goodsir ; eth- 

 moid of authors. 

 mr. Malar ; an oblique tract in front 

 of the malar is the maxillary. 

 Quadrato-jugal. 

 Os quadratum. 

 Palatine. 

 Pterygoid. 



Side view of mandible. 

 Dentary. 



Symphysis menti. 

 Surangular. 

 Angular. 

 Articular. 

 End view of skull. 

 c. Hemispherical occipital condyle 

 (end of basi-occipital). 

 fm. Foramen magnum. 

 vg. Passage for the vagus nerve. 

 eo. Ex-occipital, spreading into the 



par-occipital process, 

 m. Upper mastoid eminence. 

 ep. Epiotic eminence. 

 so. Supra-occipital crest. 



1- 



pal. 



P9- 



Fig. 2. 



d. 



sy. 



sag. 



ag. 



art. 



Fig. 3. 



whilst the posterior part has marked Ralline and even Ibidine characters. The long toes, moreover, are like 

 those of the Macrodactyli ; but the leg-bones and the bones of the upper extremities are, save in point of size, 

 exactly the counterpart of those of the common Grey Heron. 



' The letters psp are on that part of the intero-orbital septum where the ' ethmoid ' of authors lias coalesced 

 with the true pre- or rather orbito-pre-sphenoid : in the text we have followed Professor Goodsir (whom we 

 now believe to be wrong) in attributing most of the septum to the pre-sphenoid. 



