New genera and species from the Belly River Series (mid-Cretaceous) Author Lambe L. M. text Geological Survey of Canada Contributions to Canadian Palaeontology 1902 3 25 81 journal article 10.5281/zenodo.3233762 1fa3e048-6e17-4084-926c-3c77dabfffc9 3233762 Cimoliasaurus magnus , Leidy. Cimoliasaurus magnus , Leidy. 1852. Proc. Acad. Nat. Sci. Philadel., vol . v, p. 325, and ibid, 1854 vol . vii, p. J 2, pi. II, figs. 4-6 . Cimoliasaurus magnus , Leidy . 1865. Cretaceous Reptiles of the United States, p . 25, pi. v, figs 13-19 and pi. vi, (Smithsonian Contr. to Knowledge, vol . xiv). Fourteen cervical vertebrae, found within a limited space and probably belonging to one individual, are referred to this species ; they form a tolerably complete series with a gradual increase in size from front to back. These vertebrae agree with those of the type species in form but are smaller. The centra may be described as shorter than broad, with concave sides and lower surface, articular faces ellipsoidal, sligthly concave with angular margins, costal facet placed low on the sides. Neural arches in all the specimens, broken off , except in one, apparently a late cervical, in which the basal part on one side is preserved, shov,ung the height of the neural canal. The bases of the ribs still remain in a few cases. In the supposed late cervical, the costal facet extends upward on to the base of the neural arch. Two large foramina, placed one on either side of the median line of the lower surface and separated by a low ridge, are connected with a passage that opens into the neural canal by two separate apertures. The neural canal is about as high as it is wide. Measurements.

A small vertebra from anterior end of series:	M.
Length of centrum	-045
Breadth of articular face	-065
Height of same	-040
Width of neural canal	-012
A larger vertebra from posterior end of series
Length of centrum	-044
Breadth of articular face	-072
Height of articular face	-045
Width of neural canal	-015
Height of costal face	-025
Breadth of same	-022

According to Cope, Discosaurus is specifically identical with this genus. "Whilst under the generic name Cimoliasaurus, Lydekker * has included Brimosaurus , Leidy , and Elasmosaurus and Polycotylus of Cope. Belly River series, Red Deer river, below Berry creek, 1898 and 1901.