91 



ral canal is smaller than in the cervical region ; it has strong 

 neurapophyses, which develop long and depressed diapophy- 

 ses. The neural spines are low and broad. The zygapophy- 

 ses are developed on the laminae, and do not project upwards 

 as in the cervical region. 



The lumbars are much like the dorsals, except that they 

 are longer, and have very large and depressed diapophyses, 

 which project somewhat upwards. 



Measurements. 



M. 



Length of centrum of a posterior cervical .049 



Height of neural canal -015 



Fore-and-aft diameter of neural spine -023 



Length of diapophysis -023 



Dorsal. 



M. 

 Length of centrum '0555 



Length of hypapophysis -018 



Fore-and-aft diameter of neural spine 030 



Lumbar. 



M. 



Length of centrum . -057 



Fore-and-aft diameter of neural spine -0285 



Diameter of diapophysis -029 



The dermal scutes are long ellipses, deeply pitted on one 

 side, but without a trace of a keel. Their edges show no 

 signs of sutural union. 



The bones described indicate a reptile about fifteen feet 

 long. They were found near Smith's Fork, Wyoming. 



CROCODILUS PARVUS, sp. nov. 



A small reptile represented by sixteen vertebrae and a 

 portion of the pelvis. 



The cervicals have short centra, with very deep articular 

 cups and hemispherical heads ; the latter have a prominent 

 rim around the base. The hypapophyses are short, stout, 

 and very nearly vertical in direction ; the sides of the centra 

 are channelled by a deep vertebraterial canal ; the parapo- 

 physes are developed very low down, and are very prominent. 

 The diapophyses are developed partly from the centra and 

 partly from the neurapophyses; they are stout and very 



