322 



STR RAY LANKESTER ON THE 



[Apr. 7, 



cerv. 6 is but little bigger in depth and extension than is that of 

 cerv. 5 or cerv. 7. 



Text-fig. 61. 

 OKAPI. 



,erv. 5. 



71 eun 



i.z.a. 



Post. 



The last tlnee cervical vertebrae and tlie first dorsal vertebra of the Okapi 

 (Okajpia johnstmii), seen from the left side. 



Lettering as in text-fig. 60. 



Note the great size and backward extension of ti. of Cerv. 6, the complete absence 

 of ti. from Cerv. 7, and the approximation in general proportion of Cerv. 7 to 

 Dors. 1. 



The next difference is that in the seventh cei'vical of Okaj)i 

 there is no inferior transverse process at all ; whilst the superior 

 transverse process ts. is greatly enlarged, expanded and flattened 

 at its free end. No such appearance is presented by the seventh 

 cervical of the Gii-affe, which contrasts very strongly with that 

 of the Okapi. In fact, the seventh cei-vical of the Giraffe has the 

 o-eneral appearance and character of the cervical series, whilst the 

 seventh cervical of the Okapi is, in all its characters except that 

 of actually giving articulation to a bony rib, a dorsal. We may 

 describe this by saying that the last cervical is "dorsalized." 



