1907.] 



HORXS OF THE GIRAFFE. 



103 



invaded as it were — the area of the frontal bone to a veiy slight 

 extent. 



It seemed hardly possible to doubt that the ossicone of the 

 Giraffe takes its origin within the area of the parietal bone, but 

 that conclusion was forbidden by the explicit statement of the late 

 Sir Richard Owen who, in a paper published sixty-seven years ago 

 (1840) in the ' Transactions' of the Zoological Society, described a 

 newly-born Giraffe which had died in the Gardens of the Zoological 

 Society. Owen there states that he found the lateral horns of this 

 Giraffe to be definitely attached to the frontal bone, and to that 



Text-fis-. 27. 



"^V^- / J' 



View from above of the fronto-pavietal region of the skull of an immature Okapi. 



oec.h., angle of the occipital crest ; g.t.l., position of the lateral tumescence of the 

 ■parietal which supports the paired ossicones of the Giraffe, absent here ; o.t.l., 

 the Okapian tumescence of the frontal which supports the paired ossicones of 

 the Okapi; zij.,i\\e zygomatic arch; po., posterior angle of the orbit; ao., 

 anterior angle of the orbit ; ]pl.v., preelacrymal vacuity ; otm., the slight median 

 tumescence of the base of the nasals of the Okapi ; sof., supraorbital fossa ; 

 sfp., the fronto-parietal suture. 



For comparison with text-figure 26. 



(Prom Trans. Zooi. Soc. vol. xvi. p. 290.) 



bone exclusively. He gives the drawing, which is copied in text- 

 fig. 29, p. 104. He draws attention to the suture (s) separating 

 the two bones seen in section, and he states that x is the frontal 

 bone and y the parietal. He arrives at the conclusion that whilst 

 the lateral horns of the Giraffe are seen thus to originate as do the 

 horns of all other Pecora, in connection with the frontal bone. 



