286 



size. The occipital surface is broad and well defined, and the vertebree of the neck retain 

 their full size to near the cranium. The two upper ones support posterior metapophyses. 

 The rule-aural ossicles are preserved. 



Mus. Brookes. 



1487. The skeleton of a younger specimen or female of the Pied Hornbill (Buceros 

 violaceus}. 



In this skeleton also the atlas and axis are wanting, and perhaps also another cervical ver- 

 tebra. Of the 16 vertebrae which remain between the skull and sacrum, the last six support 

 moveable ribs ; and of these the second, third and fourth pairs join the sternum : the sacral 

 pair of ribs are wanting. The horuy sheath of the mandibles has been removed from the 

 left side. The sternum has two shallow notches behind in both skeletons. 



Mus. Langstaff. 



1488. The skull of a Rhinoceros Hornbill (Buceros Rhinoceros}. Hunterian. 



1489. The skull of a Rhinoceros Hornbill (Buceros Rhinoceros], from which the 

 horn-like process has been removed ; showing the light cancellous structure of 

 the beak to which it was attached. Hunterian. 



1490. The mandibles and portions of the tympanic bones of a Rhinoceros Hornbill 

 (Buceros Rhinoceros). Mus. Brit. 



1491. The horny sheath of the upper mandible of a Rhinoceros Hornbill (Buceros 

 Rhinoceros). Hunterian. 



1492. The mandibles and crest of the Rhinoceros Hornbill (Buceros Rhinoceros), 

 longitudinally and vertically bisected. Hunterian. 



1493. The skull of the Helmet Hornbill (Buceros aaleatus). The horny sheath is 

 left on the beak ; the hinder hah of the cranium has been removed, which 

 shows the strong vertical median bony wall dividing the fore-part of the pros- 

 encephalic chamber Presented by Sir T. 8. Raffles, F.R.8. 



1494. The mandibles, with their horny sheath, of the Helmet Hornbill (Buceros ga- 

 leatus). Mus. Leverianum. 



