lvon] the hares and their allies 409 



more conspicuous and is found to project laterally from the side of 

 the fifth vertebra. 



The length of a neural spine in the anterior thoracic region is 

 about equal to twice the length of a centrum. The tenth thoracic is 

 the anticlinal vertebra. Well developed metapophyses are found on 

 the last four thoracic vertebrse. 



The lumbar vertebras (pi. xci\-, 13) of Liiiiiiolagiis are quite pecu- 

 liar. The transverse processes are shorter and much broader than 

 they usually are in the Leporidse, the longest being equal to the length 

 of the centrum to which it is attached and a fourth of the centrum in 

 front. Their breadth makes them appear shorter than they really are. 

 The free extremity of the transverse process is more expanded than it 

 is in any other genus except Roiiicrolagiis. The attached base is very 

 wide, coming from the whole side of the centrum, so that the angle 

 between the main axis of the transverse process and the side of the 

 centrum is filled in with thin bone, approaching the condition found 

 in Roiiicrolagus. This character of the transverse process is es- 

 pecially marked in the anterior part of the lumbar series. The 

 spinous processes of the lumbar vertebrae are low, triangular in out- 

 line, and directed forw^ard. True anapophyses are lacking. The 

 hypophyses are injured in the single available skeleton, but it is 

 probable that the second was the longest. 



The sacrum differs in no w^ay from the description given in the 

 general account ( page 362 ) . 



The total number of caudal vertebrae in Liiunolagiis is eleven, of 

 which the first is long with a complete neural arch, the next five are 

 shorter, wider, with more or less evident transverse processes, and 

 the terminal five consist of small rudimentary centra without neural 

 arches or processes. 



Sternum and Ribs (pis. xcvi, 5 ; xciv, 6). — The anterior portion of 

 the presternum of Lininolagiis is considerably enlarged laterally, hav- 

 ing a tendency to be intermediate in form between the presternum of 

 Lcpiis and that of Rouicrolagns and Oclwtona. The mid-ventral 

 line of this expanded part bears a low keel which is not extended 

 backward on the posterior portion of the presternum. The first 

 pair of ribs is attached to the middle of the sides of the presternum. 

 The mesosternum of Liinnolagiis as a whole is wider than it is in 

 most of the other genera. It is also shorter, so that its length is but 

 little greater than that of the presternum or of the xiphisternum, both 

 of which are subequal. The first, second, and third mesosternal seg- 

 ments are about equal in length, the fourth is shorter. Each success- 

 ive segment is wider than the one immediatelv in front. The third 



