iSpS.] Osboni, Additional Cha)-acters of Caniarasaurus. 229 



ferred to Aiii/>/iiraiias alttis, agrees closely with that here shown to belong to 

 Camarasaiiriis. (12) In the twelfth notice (Marsh, iSyg) a new type, Bronto- 

 saiirus excc/sus, was defined. Characters : Sacrum composed of five thoroughly 

 coossified vertebrje ; in other respects resembling Morosaurus from the Como 

 Beds of Wyoming. The succeeding notices of these animals are fully embraced 

 in Marsh's Memoir, " The Dinosaurs of North America," published in 1897. 

 Here (pp. 166-241 ) the order Sauropoda and family Atlantosaurida' are described, 

 the latter, however, not including the genus Ca»iarasanrns, which is placed in 

 the Morosauridaj (page 241). 



Comparative Measurements of Limbs, Arches, Vertebr.^. 



Total length of scapula ... . 

 Greatest diameter of coracoid 

 Antero-posterior, ilium . . .: 

 Total length of ischium 



" " pubis 



" " femur 



Height of ant-dorsal spine . . 



" post-dorsal spine. . 

 Length, centrum ant-dorsal . 

 Median caudal 



«5? 



1060 

 I930" 



1050 



1600 

 672 



II18 



I168 



1750 



948 



276 



It is a priori im- 

 probable that so 

 many different gen- 

 era of gigantic Sau- 

 rian s of similar size 

 co-existed. It is 

 against the princi- 

 ples of evolution 

 that closely similar 

 types of equal size 

 should occupy the 



, • 1 Fig. 8. Brontosaurus excelsus. Posterior cervical vertebra, 



same territory at tne After Marsh, 1807, Plate xxi. Approximately i'b natural size. 



' These measurpments are given in Cope's second paper upon Camarasatirus. (Am. 

 Phil Soc, Dec, 1877, pp. 242-245.) 



'■^ These measurements are approximate, as no exact measures have been published. 



^ Cope gave the length of this femur as 6 feet 4 inches ( = 1930), and described it as longer 

 than that of Cai>ia>asmirus, but in his metric table it is by misprint assigned 1524 mm. 



