110 
to the genus Clepsydrops Cops, he makes the following remarks 
„Of the general affinities of this genus it is only necessary now to 
state that my reference of it to the Rhynchocephalia is confir- 
med. It differs from the recent species of the order in the absence 
of the quadrato-jugal arch, and the remarkably developed ischia. On 
this account I refer to Clepsydrops and itsfallies as a distinct sub- 
order under the name of Pelycosauria.“ 
Later we find the following additional notice’): „The division 
Pelycosauria is established primarily on the genera Clepsydrops 
and Dimetrodon, but their cranial structure renders it highly 
probable that Ectocynodon, Pariotichus and Bolosaurus 
belong to it. It is also probable that the genera Empedocles, 
Embolophorus and others determined from vertebrae belong to 
it, as the latter are frequently accompanied by pelvic bones of 
the type of that of Dimetrodon. All the genera known from 
teeth are of carnivorous habit, excepting Bolosaurus and Dia- 
dectes; they may be referred to a single family on this ac- 
count, which I call the Clepsydropidae. Bolosaurus will 
form the type of an other family characterized by the transverse 
position of the crowns of the teeth, under the name of Bolo- 
sauridae.“ Owen’s Theriodontia correspond, according to COPE, 
to his Clepsydropsidae, since Owen does not include herbi- 
vorous forms in his division. ,,As it is plain that the herbivorous 
and carnivorous types belong to the same order, and probably sub- 
order, it becomes necessary to subordinate the term Theriodontia 
to that of Pelycosauria.“ 
‘On the 7th of November, 1878 Cope read a paper before the 
National Academy of Sciences, at the meeting in New York, in which 
he made further remarks about the Pelycosauria. An abstract of 
thls paper was published in the December-Number of the American 
Naturalist?). The order Theromorpha is established, as distinct 
from the Rhynchocephalia, containing the suborders Pelyco- 
sauria and Anomodontia (Owen). 
The characters of this order, with its two suborders were given 
as follows: 
„Iheromorpha Core. Scapular arch consisting at least of 
1878, p. 510—511, published May 8, 1878; also published as Palaeont. 
Bull., No. 29, under the same date. 
1) E. D. Cops, 1. ec. p. 529—530. 
2) E. D. Corr, The Theromorphous Reptilia. Amer. Natur., Dec. 
1878, p. 829—830. 
