486 



GEOLOGY OF THE DENTEE BASIN". 



made in 1877, by Capt. H. C. Beckwith, I'. 8. X., and Prof. .Arthur Lakes, 

 and the sacrum of the type specimen is represented in tig-. 38, below. This 

 fossil, with other remains, was found in place in the upper part of the 

 Atlantosaurus beds, on the western slope of the foothills, south of Golden. 



'^^OOp^ 



I ni 



; °°o 



»Ooo, 



X 



[•i0oo Oon ; 



?'0 000 oo 



Fig. 30. — Left hind paddle of Saptanodon discus Harsh. One-eighth natural • 



Fig. 31 Cervical vertehra of Baptanodon natans Marsh. ( >ne-third natural sizi 



A., Bide view; /•', front viev : C, Bection; I>, top view; a, anterior articular face; n, neural canal; r, r', faces 



Fig. 82 Posterior 



,1, Bide vi. n : ;.-. n 



i i. al - i rtebra of Panlotaums striates Marsh. One half natural 

 view; 0, bottom view; u anterior face; n, nenral canal; p, poste 



Subsequent researches resulted in the discovery of other specimens near 

 the -nine locality. Still later, systematic explorations were carried on by 

 the writer at various points along the same horizon farther south, especially 

 in the vicinity of Morrison, and at every locality interesting discoveries 

 were made. 



