THE SKELETON IN MAMMALIA. THE SKULL. 



475 



forms only the middle part of the slender zygomatic arch, the 

 anterior part being formed by the maxilla. The lachrymal 

 (fig. 96, 15) is small and lies almost entirely inside the orbit. 

 The anterior narial aperture (fig. 97, 8) is wide and directed 

 upwards, opening high on the anterior surface of the skull. It 

 is bounded above by the short thick nasals and below by the 

 premaxillae. The narial passage is freely open, maxillo-tur- 

 binals not being developed. The palatine is well developed, 

 the pterygoid is small and early fuses with the pterygoid 



17 



8--. 



mm4 



FIG. 97. LONGITUDINAL SECTION TAKEN RATHER TO THE RIGHT OF THE 



MIDDLE LINE OF THE SKULL OF A YOUNG INDIAN ELEPHANT (E. 

 Indicus) x ^ . (Camb. Mus.) 



anterior nares. 12. pterygoid. 



periotic. 17. nasal, 



palatine. Other numbers as in Fig. 96. 



8. 

 10. 

 11. 



process of the alisphenoid. The tympanic is united with the 

 periotic but not with the squamosal, and forms a large auditory 



