Cope.J -^4:2 [ D ec. 21, 



Measurements. M. 



Total length 1.517 



Width distally 680 



" at middle .... . 325 



" at inesoscapula 810 



Length of glenoid face 400 



The articular extremity of the coracoid is recurved and very robust. 



The borders of the bone are thick and roughened. 



Measurements of Coracoid. M. 



/ extero-internal 690 



Diameter < antero-posterior 560 



' vertical proximally 



Measurements of Metapodial. M. 



-rv- , -ii (transverse 160 



Diameter proximally^ 



<- antero-posterior 095 



( transverse 075 



Diameter medially-; , , . -, OA 



J I antero-posterior 120 



Diameter distally i tran ^ erse 310 ' 



(. antero-posterior 105 



Length 270 



That this species was capable of and accustomed to progression on land 

 is certain from the characters of the bones of the limbs and their supports 

 above described. The extraordinary provision for lightening the weight 

 of a portion of the skeleton has more than one significance. It must be 

 borne in mind that the caudal vertebrae retain the solid character seen in 

 those genera which stood habitually on their hind limbs. That the pres- 

 ent species was herbivorous is suggested simply by its huge dimensions, 

 and the natural difficulty of supplying it with animal food. 



AMPHICCELIAS Cope. 



Paleontological Bulletin No. 27, p. 2, (Published December 10, 1877). 



The genus to which the above name is now given, is allied to Camara- 

 saurus, of which, and the gigantic species C. supremus, I have given an 

 account in my Paleontological Bulletin, No. 25. Both genera differ from 

 their nearest ally OrnWwpsis Seeley, in the excavation of the. vertebral 

 centra, so as to include large chambers separated by a septum, which com- 

 municate with the external medium by a lateral foramen. In the Omithop- 

 sis it is stated that the vertebral centra are occupied by a number of coarse 

 cells. In the more remotely allied Cetiosaurus, Owen has observed that 

 the tissue of the centra is coarsely spongy. 



The vertebrae 'from all parts of the column of Camarasaurus are known, 

 and those of the dorsal and lumbar regions present the extraordinary char- 

 acter, of which a trace is seen in Cetiosaurus, of neural spines expanded 

 transversely to the axis of the column. Numerous vetebrse of Amplrim- 

 lias are known, and in the dorsals in which the neural spine is preserved, 



