HiNTON — The Fossil Hare of the Ossiferous Fissures of Ightham. 243 



Last Lower Molar (m. 3). 



The last lower molar of L. variabilis appears to differ from that of 

 L. eiiropwus in having the posterior lobe more reduced transversely, so 

 that it does not extend so far towards the outer side as in the latter species. 

 The fossils from Iglitham agree in this respect with L. variabilis. 



Vertebra and Eibs. 



I have not been able to spare the time to examine as completely as I could 

 wish the large number of vertebrae and ribs in Mr. Abbott's collection from the 

 Ightham Fissure. I therefore content myself with stating that these parts 

 of the skeleton also show very robust proportions. 



In the skeleton in Messrs. Corner and Kennard's collection five of the 

 lumbar vertebrae are preserved, viz., the second, fourth, fifth, sixth, and 

 seventh. These were compared with the skeleton of L. v. hiberniciis in 

 the British Museum (Z. D. 76.9.7.1). Judging from the length of the 

 transverse processes, the anterior vertebra of the five in the fossil skeleton is 

 lumbar 2, but it has no hypapophysial spine, although there is a small one 

 in this vertebra of the recent skeleton. Lumbar 4 has a large hypapophysis, 

 as in the recent skeleton, and this and the three posterior vertebrse agree very 

 well in form with the recent bones, but they are much stouter. In both the 

 recent and the fossil skeleton the length occupied by the four posterior lumbar 

 vertebrse is about 76 mm., but the least width of lumbar 5 amounts to 14 "6 

 mm. in the fossil, and to only 11 mm. in the recent L. v. hibernicus. 



The ribs of the Ightham skeleton preserved are numbers 3, 4, 8, and 9 of 

 the right, and number 4 of the left side. They agree with the corresponding 

 ribs of L.v. hibernicus in form, but are of very much larger size. 



2e2 



