110 TDE WASATCH AND BRIDGER FAUN^. 



The surfoees of tlie vertebra; are very smooth, excepting where thrown 

 into coarse wrinkles near the border of the articular faces and near the 

 hypapophysis. The edges of the articular faces are somewhat revolute on 

 the sides in the cervicals, but not on the doi"sal. They are impressed in the 

 centre to a point, most strongly so as we pass forward in the series. There 

 is a fossa below the space anterior to the parapophysis of the dorsal verte- 

 bra, which is abruptly bounded below by a horizontal angle. A separate 

 neural spine, perhaps of a cervical vertebra, has the following form. It is 

 stout and contracts rather abruptly at the apex from behind forwards. The 

 section is broadly lenticular, angulate in front and truncate behind. The 

 posterior foce has several longitudinal wrinkles, including a median raised 

 line, and there are some more irregular wrinkles on the sides. 



Mea,surements of vertebra:, 



Autcriorface of os deutatum ^ width 025 



4 depth (oblique) 012 



Posterior face of 03 deutatam I ^^'*ltli 020 



\ depth 018 



Length 03 dentataiu above 014 



(posterior face J *l''I'f'' ^^- 



Diamoters axis ^ < width 020 



( length 0185 



Hypopopbvsial facet OS dentatuuJ ''''I'"' ^^ 



l width 014 



^. , . . , ( leUL'th 022 



Diameters fourth cervical < , ■, ^^ n.v.= 



< anterior •^"Ptli ^^^ 



\ width 022 



. , (length 0215 



Diameters sixth cervical < ^ i .i i>.>i.- 



< anterior M«l"l^ ^^'' 



< wid 



vidth 02;i5 



Space between parapophysis and diapophysis of do 0040 



^. _ _ , , , ( length t'2l)5 



(pth O2G0 



id(h 02C5 



anierior . 



jd< 



( w 



Height of neural spine of f from postliypapophysis "210 



Anteroposterior width of do. at base 0100 



The portions of ribs are separated heads and shafts. The former 

 are doul)le and therefore cervical, and are quite large. If the shafts belong 

 to them, tlie neck of this species must have been wide. The shafts are slender 

 and of dense bone. The section is oval at the middle, but towards the dis- 

 tal extremity becomes flattened and grooved, and delicately lined on one 

 side. The extremities of the long bones are without condyles, but have 

 concave surfaces like those of the ribs. The bodies are robust and angular. 

 They may be abdominal ribs of unusual stoutness. 



From the Puerco beds. 1). Haldwin. 



rp 



