122-j 



THE EXTINCT BATRACHIA, 11EPTIL1A 



side of the centrum, which is below the middle line. It holds the same position in the thirty-sixth in II. foulkei, but 

 is above the middle in the thirtieth and those anterior. 



MtcuurtlMftt. In. 



Depth centrum to summit chevron articulation, 5 



do. from neural canal without chevron face, 4. 



Greatest width do., 4. 



Length centrum, 4 



do. ncurn.pophysis, 2 



Width between anterior zygapophyses, I 



do. of arch above, 1 

 do. neural canal, 

 Depth do. do., 



do. basis neural spine, 5 



This specimen was procured from the marl pit of W. J. Thompson, Sampson co., N. Carolina. 

 A second and much smaller vertebra from the pit Unit furnished the remains of Hypsibema crassicauda, belonged 



to ;i third individual, and possibly to this species. Its proportions would point to a position near tin; end of the tail. 



and its form is less elongate and. compressed than those in that position in II. foulkei. Its neural arch is not coossi- 



lied. The extremities are slightly concave, the general form subqitadral c. 



I, in. 



!) 



:i 



:! 



6 

 10 

 10 



Length of centrum, 

 Diameter extremity, (vertical) 

 " " (transverse) 



■' middle, " 



Linen. 

 20.5 

 is. 

 21.5 



15. 



Tin; first named vertebra pertained to an immense species, perhaps double the Hadrosaurus foulkei in weight ami 



bulk, should the general proportions of the two have been at all similar. In that case the length of the femur would 

 lie sixty-two and a quarter inches. It will remain for future discovery to determine whether the species is the same 

 as the Ornithotarsus immanis. 



HADROSAURUS MINOR, Marsh. 



Proceed. Acad. Nat. Sciences, .Ian. 1870, Nature (London), .Ian. 1870. 



This species is represented by two dorsal, four lumbar and a caudal vertebne, from Barnesboro, Gloucester co., 



N. J., and another dorsal from another locality. These belonged to an anima] of about, half the size of the II. foulkei, 



and not fuHy grown, excepting the last mentioned, which belonged to an adult. The dorsals are much compressed, 



and slightly concave in front, and convex behind; the inferior surface not distinctly keeled. The lumbar is short,, much 

 broader, being subdiscoid, and distinctly convex anteriorly and concave behind: below, it, presents a, narrow promi- 

 nent carina. The caudal is anterior and is discoid and short; the diapophyses with neural arch are lost, not having 

 been coossified; the former was at the base of the latter. Articular faces nearly plane. Articular surface's for chev- 

 ron bones small. Inferior face not, excavated. 

 The upper bed of Cretaceous Green Hand. 



LAELAPS, Cope. 

 LAELAPS AQUILUNGUIS, Cope. 



Mamillary bone. The form of the maxillary bone described on page 100, indicates a short elevated and narrowed 

 muzzle, as in Teralosaurus. 



Tschia. The elements described on p. 108 as pubes, are probably ischia,. As in Mega,da.cfylus, they appear to 

 have been directed backwards, and to have been in close contact for a considerable part of their length. On plate X, 

 tig. 4, the surface of contact, or symphysis, is represented on I, he inferior part of the distal two-thirds the length. The 

 anterior, dilated portions diverge, leaving a. V -shaped interval, and extend to flic acefabiila. This union of I he ischia, 



which are of very dense structure, furnished some support for the animal in a squatting position, as is indicated for 

 some of the species of I he Connecticut Sandstone. 



