218 Seventific Intelligence, 
Jurassic—Ornithosauria; Dinosauria; Ichthyopterygia; Crocodilia; Saurop- 
terygia; Testudinata; Lacertilia. 
Triassic—Dinosauria; Anomodontia; Rhynchocephalia; Ichthyopterygia; Croc : 
odilia; Sauropterygia; ? Testudinata. ? ; 
Permian— ? Rhynchocephalia. 
It will be observed, by this table, that the most specialized Rep- 
tilian order, the Ophidia, appeared last in time in the Eocene 
period ; and that those which constitute the line of connection with 
the generalized reptiles appeared earlier as they approached the 
latter,—the Pythonomorpha in Cretaceous, and Lacertilia in 
sic times. The Reptilian groups most specialized in bird charac 
ters (Ornithosauria and Dinosauria) appear on the other hand very 
early ; the first andjmost mammalian also,—the latter of the two, ' 
in Jurassic beds. The Trias gives us in the Anomodontia and | 
: 
derma allied to Sphargis, without carapace, and thus the most 
lizard-like of the order. The Lacertilia of European Jurassic strata 
are, some of them at least, acrodont, apparently Pachyglossa (¢ 9» 
Acrosaurus), and, as such, nearer the Rh chocephalia, which pre 
hem in time. € position of Homorosaurus an . 
ay 
of Wagner. 
mesosternum of the former refers it to either the Pachyglossa % 
e Crocodilia of the Jurassic do not possess the ball-and- 
socket-jointed vertebra of the recent genera, and exhibit the a 
articular faces of all the Jurassic and Triassic Reptilia. 
* The identity of these two propositions has not always been noticed by author. 
