259 



Five vertobrne rxhihif Ihe character of siippnrtiii<i: the neiinil arch af 

 only one end by a sliort hasal articuhition. In three of these, with neural 

 arches remaining, the hatter inchise a vertically oval canal, "^riiey have a 

 small narrow area above lor contact with the canipace, anil, although their 

 centra arc plane, they arc doubtless sacral in position. They display large 

 facets for the diapophyses. The centrum of the last one is .shorter, and has 

 a posterior ball. 



Abundant in dilFerent localities in No F) of New Jersey. 



OSTEOPYGIS EMAKGINATUS, Copc. 



Extinct IJatracliia ami Uoptilia of North Aiiiorica, l-7tl, ]i. 13('i, I'Uilr VII, (1^. '^■ 



Grecnsand, No. f). New Jersey. 



EUCLASTES, Cope. 



Piococtlings of till' Ac.ldciny of I'liiladi'lphia, l-'CiT.H'J; jio.ssibly iilriitical witli Ost(^pyg'is. 



EuCLASTES PLATYOPS, Cope. 



L. c, and Extinct IJatrachia and Roptilia of North Anicrica, I-'TO, p. 1 17, Phiti' VI. 



Limestone of No. 5, New Jer.sey. 



CATAPLEURA, Cope. 



Extinct Haliacliia and lieptilia of North Anicrica, l.~7U, p. 143. 



Catapleura repanua, Cope. 



L. c, 1870, 143, Plate VII, lig. ■>. 



Grecnsand, No. 5, New Jersey. 

 Catapleura poxderosa. Cope. 



Proceedings of the American Philoso])liic:il .Society, l.-i71, p. 40. 



Green.sand of No. 5, New Jersey. 

 Catapleura ciielydrina. Cope. 



Os/cojJi/jis c/i(J//rfjiiii()(, Cope, Extinct liatracliia and Reptilia of Nortli America, 1^70, p. 13?, 

 Plate Vll, fi-. 8. 



The reference of the last twt) species to this genus is not linal, as the 

 essential parts of the skeleton, — tiie anterior co.stal and marginal bones, — are 

 not known. The type-species differs from the Osteopijgis (in all of which 

 the corresponding marginal bones are known) in the absence of any costal 

 gomphosis with the second marginal. 



