. Osteology of Haplocanthosaurus : with description of a new species, and remarks on the probable habits of the Sauropoda and the age and origin of the Atlantosaurus beds. nd which suggested the generic name(Jeliosaurus. This difference in character wouldseem a very important one, if it were shown toexist in those vertebrae of Cetiosaurus which aremost cavernous in Kapdocanthosaums. There are, however, other and quite strikingdifferences, notwithstanding the general similarity in the osteology of these two coracoid, according to Owen, is especially different, as will be apparent aft
. Osteology of Haplocanthosaurus : with description of a new species, and remarks on the probable habits of the Sauropoda and the age and origin of the Atlantosaurus beds. nd which suggested the generic name(Jeliosaurus. This difference in character wouldseem a very important one, if it were shown toexist in those vertebrae of Cetiosaurus which aremost cavernous in Kapdocanthosaums. There are, however, other and quite strikingdifferences, notwithstanding the general similarity in the osteology of these two coracoid, according to Owen, is especially different, as will be apparent after acomparison of Figs. 19 and 22. If Owens figure is correct the coracoid of Cetio-saurus is without a foramen, a character which, if correct, is entirely unique, in sofar as I am aware, among not only the Sauropoda but ithe herbivorous dinosaursgenerally. It appears to me quite possible that Owens figure is erroneous and thatthe coracoid is so distorted or imperfect as not to show a foramen in the examplefrom which his drawing was made. It does not seem possible that such a strikingdifference could normally have existed in the coracoids of two genera otherwise so. Fjg. 22. Cor&co\&oiCetiosauruslongiisOweu, after Owen. ^V natural size, sc,surface for scapula ; h, surface forhumerus. 54 MEMOIRS OF THE CARNEGIE MUSEUM closely related as these genera appear to be and I would suggest a reexamination ofthe British specimen by those who may have access to it. While Haplocanthomuruisand Cetiosaurus are certainly generieally distinct I believe they may pertain to thesame family. Although there are undoubted close similarities in structure between Huplocantho-mums and the three genera of British Sauropods mentioned above, yet, if we can relyupon the characters represented by a single vertebra, it is in South America thatthere has been found the remains of a Sauropod dinosaur showing the closestrelations with this genus. I refer to the dorsal vertebra recently described andfigured by F.
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