Nodosaurus textilis Marsh. Ill 



lacking, but longitudinal ridges give the centra almost 

 a fluted appearance. The ventral grooves are especially 

 marked. The neural arch and spinous process, propor- 

 tionally to the centrum, are much as in Nos. 16 and 17. 

 The superior margin of the spinous process is curved, in 

 contrast to the straight margins which have characterized 

 those before. 



Caudal 31 (pi. IV, ^g. 1; text fig, 3).— This bone is 

 markedly different from its predecessors in the lack of 

 fore-and-aft ridges on the centrum, and in the character 

 of the zygapophyses. The prezygapophyses are short, 

 not extending to the end of the centrum, while the post- 

 zygapophyses are very long, ^vith an extremely long 

 articular facet. There is no upward extension of the 

 spinous process above the zygapophysial level, unless a 

 small rounded eminence over the prezygapophyses 

 represents it. 



Caudal 34 {fig. 3). — This caudal is imperfect but is 

 curiously abnormal in that the very narrow ventral 

 groove lies well toward the left side of the rather 

 broadened lower aspect of the bone. Otherwise the bone 

 shows no marked distinctions from caudal 31, except 

 that the centrum is not apparently prolonged in front 

 of the pedicel to the extent that it is in the latter. 



Measurements of Caudal Vertebrce. 



4 17 24 31 



mm. mm. mm. mm. 



Length over all, over zygapophyses 86.5 69 87* 



Height over all 114 77 + 53.5 43 



Centrmn, length 65.5 73.5 62.5 57 



Centrum, ant. face, height 64 50 ± 35.5 24 



Centrum, ant. face, width 68 55 40 ± 



Centrum, ant. face, circumference 210 165 ± 



Centrum, post, face, height 66 52.5 35.5 23 



Centrum, post, face, width 69.4 54 ± 43.5 31 



Centrum, post, face, circumference 215 190 it 135 ± 



Neural canal, ant. end, height 23 13 5 



Neural canal, ant. end, width 12.5 9.5 



Width across pedicels 30 



Width across prezygapophyses 39 



Width across postzygapophyses 39 13 



Spinous process,. length, summit 64.5 



Index, centrum, length to height, ant. face . 1.0234 1.47 ± 1.732 2.376 

 * Postzygapophysis prolonged. 



Fore Limh. 



Scapula {Rg. 7). — Both scapulas are represented by 

 fragments which unfortunately do not supplement one 

 another, as they all pertain to the extremity of the blade. 



