FOSSIL VERTEBRATES — REPTILIA 733 
proportions as in the modern Crocodile. Remains of the genus 
are known from the Trias of Germany, and from the same hori- 
zon in both the eastern and western parts of the United States. 
Stagonolepis and Parasuchus are forms separated from the fore- 
going by minor characters of the skull and teeth. The first is 
known from the Triassic (?) Elgin Sandstones of Scotland, and 
the latter from the same horizon, Maleri Sandstone of the East 
Indies. 
Pseudosuchia.—These are very peculiar forms from the Trias- 
sic rocks; the genera were all small, not over a foot long at the 
outside; the most characteristic thing about them was the devel- 
opment of a cuirass of bony plates in the skin, that protected 
every part of the body from the head to the tail, and included 
the ventral as well as the dorsal side of the body. 
AStosaurus, from the vicinity of Stuttgart in Germany, is the 
best known form. A single slab in the Stuttgart Museum has | 
the remains of twenty-four individuals preserved in it. 
Typothorax is the name given to a form described by Cope 
from fragments of the ribs and the dermal plates discovered in 
the Triassic rocks of New Mexico. 
Eusuchia.—Vhis suborder is in general characterized by the 
shortness of the premaxillaries and the location of the external 
nares far forward on the snout; the roofing over of the palatal 
portion of the mouth by the gradual extension inward of the 
palatine and maxillary bones, and the crowding of the internal 
nares back toward the posterior part of the mouth. There are 
two sections described, the Longirostres and the Srevirostres ; 
the first possesses a long, slender rostrum formed by the exten- 
sion of the maxillary bones; the anterior nares are not divided 
at the anterior extremity, and the teeth are little differentiated. 
The Brevirostres have a short snout, with the anterior nares 
divided, and the teeth more or less differentiated. 
The Longivostres contain several families, typical of which 
are the Zeleosauride and the Gavialide. The Teleosauride are 
the oldest known of the Zusuchia, specimens being known from 
the Lias. The oldest of the forms were marine, and the latter 
