CIMOLIASAURUS. 27 



In all the lumbar vertebrae the abutments of the vertebral ar en are fully coossi- 

 fied with their body, leaving no well-marked trace of the former sutural connection. 

 The spinal canal is wide, and is depressed at the floor towards the middle, where it 

 exhibits one or two large venous foramina. In all the specimens the transverse 

 processes have been broken off, but in all, their remaining bases are seen projecting 

 from the lower part of the side of the body. They spring from nearly the whole 

 width of the body, with which they were completely coossified, though they pre- 

 sent the appearance as if they formerly possessed a sutural attachment. They 

 were evidently robust and strong, and were directed obliquely outward and down- 

 ward. 



The sides of the body of the vertebrae form, together with the sides of the verte- 

 bral arch and the upper part of the transverse processes, a nearly uniform slope, 

 broken only by a slight elevation formed by the apparent sutural coossification of 

 the transverse process with the body. The under part of the body between the 

 transverse processes nearly forms a level surface, more or less elevated into a ridge 

 between the venous foramina, and depressed along a line with the position of the 

 latter. 



Measurements, derived from the largest and the smallest of the series of eleven 

 lumbars, are as follows : — 



LARGEST. SMALLEST. 



Lines. Lines. 



Length of body . . ' 35 24 



Breadth of articular surfaces ........ 44 31 



Height of articular surfaces ........ 36 22 



Width of spinal canal 10 8 



The vertebrae, above described, were briefly noticed a few years ago in the Pro- 

 ceedings of the Academy of Natural Sciences, volume V, page 325, and referred 

 to a Reptile under the name of Cimoliasaurus magnus. 



Fourteen vertebrae of the same Saurian as the preceding have been submitted to 

 my inspection by Mr. O. R. Willis, through Prof. Cook. They all evidently be- 

 longed to the same individual, and were obtained from the Green-sand, near Free- 

 hold, Monmouth Co., N. J. Six of the specimens are dorsal, the remainder lumbar 

 vertebrae. Of the former, three appear to have had their transverse processes at the 

 conjunction of the vertebral arch and body ; the others had them situated succes- 

 sively lower on the sides of the body. 



Two of the more anterior dorsals are represented in Figs. 1, 2, 3, 4, Plate VI. 

 They exhibit a slight want of symmetry, which is the case also with another ante- 

 rior dorsal, but this character is a deformity, or mere individual peculiarity. The 

 body is a little longer and higher, in relation with the breadth, than in the dorsals 

 above described, and hence presents a more cylindrical form. The articular extremi- 

 ties are moderately dished, and have a somewhat prominent annular margin. 

 They are nearly circular, but notched above, and are shai-ply defined by a subacute 

 ridge from the rest of the body. The bottom and sides of the latter are narrowed 

 towards the middle or are concave longitudinally, and they present a number of 

 foramina, varying in size, which communicate with venous channels opening into 



