INTEODUCTION. xix 



that of the Cat *. The meatus audUorius eaierv/m has a rather prominent 

 inferior margin at its outer aperture. There is no conspicuous carotid 

 foramen, because the carotid canal f opens posteriorly into iXieforaiuen 

 lacenim posterius %. Thence it runs forwards through the inner wall 

 of the bulla, and opens anteriorly close to the inner side of the groove 

 for the Eustachian tube '5^. Upon emerging from the anterior end of 

 the canal, the artery turns upwards, and, after forming a loop, enters 

 the skull through the foramen lacerum viediu.'s. The paroccipital 

 process (/«) is very peculiar in shape. It is long, prominent, and 

 laterally compressed. It is somewhat applied to the bulla, though to 

 a less extent than in the Cats or Felidce \. The mastoid is moderately 

 prominent. The condyloid foramen is very conspicuous, opening as it 

 does on a ridge which extends from the paroccipital to the condyle f . 

 That small chanuLl in the skull, known as the alisphenoid canal**, is 



f 



Fis. «. 



^ ^"i^^^^i*. 



^■^y • rar 





BO 



■["- 



C 

 Section of auditory bulla of Dog (Flower). 

 am, external auditory meatus ; BO, basioccipital bone ; car, carotid canal ; e. Eustachian 

 canal ; <j, glenoid foramen ; s, septum ; Sr£, squamosal bone ; T, tympanic bone : 

 t, tympanic ring. 



constantly present, and there is also a large glenoid foramen. The 

 bony palt'.te is l)ut very rarely prolonged backwards beyond the hind- 

 most molars. The ethmoid and ethnioturbinal bones are always very 

 large and extremely convoluted (in relation with the highly developed 



* Op. cU. p. 67, fig. '66. t Op. cit. p. sy. 



t Oji. cit. p. 62. § O^J. cit. pp. 66 & 298. 



II 02>. cit. p. »2. % Oj). cit. pp. 57 & 58, fig. 29. 



•• Op. cit. p. 447. 



c/2 



