HYAENA SFEL.EA. 157 



Subjoined (fig. 60) is a great proportion of the lower jaw, 

 with the dentition complete, excepting the incisors: it 

 corresponds with the abovecited cranium in size. 



Fig. 60. 



Lower jaw and teeth, Hycena spelasa, ^ nat. size. Kent's Hole. 



Several characteristic specimens of the Hyana spelaa 

 from this 'cavern are preserved in the collection of Dr. 

 Buckland ; and some very interesting ones were obtained for 

 the British Museum, at the sale of the collection of the late 

 Mr. Mac Enery. Among these is the anterior part of the 

 lower jaw, shewing a malposition of the second permanent 

 premolar on the left side ; the corresponding deciduous 

 tooth is retained, worn down to the stumps, and its succes- 

 sor projects, external to it, from the outer side of the jaw. 

 Here, as in the Kirkdale and Oreston <;aves, the jaw of a 

 young Hyaena was found, which shews the deciduous and 

 permanent teeth (fig. 61). The point of the permanent 

 canine has just begun to protrude from the socket ; the 

 three deciduous molars are retained, the last having the 

 form of the sectorial tooth : these are succeeded and dis- 

 placed by the first three molars of the adult, which have 

 the conical form : the permanent sectorial tooth, s, is deve- 

 loped behind these, and rises behind the deciduous sectorial, 

 which it does not displace ; it is developed earlier than the 

 anterior permanent molares. 



