1867.] PROF. HUXLEY ON THE CLASSIFICATION OF BIRDS. 427 



Fig. 6. 



The inferior face of the skiill, and a lateral view of the outer side of the right 

 ramus of the mandible, of Charadrius pluvialis ; of tlie size of nature. 



Pmx. The prsemaxilla. Mx. The maxilla. Mxj). Its maxillo-palatine j^rocess. 

 PL The palatine bone. Pt. The pterygoid bone. Qu. The quadrate bone. 

 X The basipterygoid process. 



Fig. 7. 



F>- 



Fmx 



Mxp 



A side view of the fore part of the skull of Charadrius phunalis, enlarged. 

 Pnuc, Mx, Mxp, PI, as before. Na. The nasal bone. Fr. The fronttd. Efh. 

 The ethmoid. L. The lachrymal. * Tlie ossified prefrontal process of the 

 ethmoidal cartilage, which separates the orbital from the nasal chamber. 



Anteriorly the body of the palatine gradually narrows into its "an- 

 terior" or " maxillary process,''' the origin of which is coincident with 

 the abrupt termination of the inner lamina. The slender anterior 



