492 Bulletin American Museum of Natural History. [Vol. XXXIV, 
contemporaneous. The group of these few genera is characterized in the 
skull by a broad infratemporal fenestra and a relatively great supratemporal 
fenestra, cutting farther into the parietal roof; in the body they are char- 
acterized by subquadrate and scale-like dermal scutes. They may be called 
the Family Mystriosuchide. Phytosaurus kapffi and buceros have long 
narrow infratemporal fenestra, very small and narrow supratemporal open- 
ing, relatively longer and more backwardly directed squamosal rami, nar- 
rower and more horizontal preorbital openings; the dorsal dermal scutes 
‘are in transverse direction long and narrow strips, touching each other 
like tiles; these scutes most nearly resemble Aétosaurus. This family 
may be called Phytosauride (s. str). Both of these families are preceded by 
the Stagonolepide as characterized by the author (I. c.), consisting of Stago- 
‘nolepis and Mesorhinus. 
There is no doubt that Phytosaurus buceros is very nearly related to 
Phytosaurus kapffi, much nearer than to any other known form. One differ- 
ence is in the formation of the snout; the low anterior part is very much 
longer than in Phytosaurus kapffi, but there also the very extremity of the 
snout is really low. The lower part of the snout being relatively longer than 
in the other species would not be enough for a generic difference. So in the 
present state of knowledge I do not see any reason for establishing a new 
genus for Phytosaurus buceros as Jaekel did (“ Metarhinus”’ |. c. p. 220). 
From the resemblance of the skull it is supposed that the dermal scutes 
were of the same type as in Phytosaurus kapffi. Now Typothorax has such 
an armature, but it also has at the same time an extremely aberrant type of 
ribs and peculiar skeleton bones with extraordinarily thickened articular 
ends. It is absolutely impossible to declare Phytosaurus buceros and Typo- 
thorax coccinarum as belonging to the same species or even genus. I 
only say that this is the only true Phytosaurian skull hitherto known in 
America, and on. the other hand Typothorax is the only type of armature 
much resembling Phytosaurus kapffi (except the smaller Stegomus arcuatus), 
therefore while this idea, that Typothorax and Phytosaurus are identical, 
may arise I do not think it is very probable. 
3. Episcoposaurus horridus Cope. 
In the Triassic Cope Collection many bones and fragments are marked 
with the same number (2307) as the type specimens; that means they come 
trom the same place. The boxes containing them are also marked in Cope’s 
‘handwriting, as. Episcoposaurus horridus, but nevertheless they belong to 
different Parasuchia. It is impossible to take out only those bones de- 
