490) Bulletin American Museum of Natural History. [Vol. XXXIV, 
Parasuchia than with the Pseudosuchia, but there is no unmistakable cri- 
terion. Typothorax coccinarum may possibly be related to Stegomus arcuatus 
(not to S. longipes). Probably a new family should be established, the 
Typothoracidee, from the characters of the ribs. I leave it open to the future 
to decide whether 7'ypothorax belongs with the Pseudosuchia or with the 
Parasuchia, but I personally have rather the impression that it is a Para- 
suchian. 
PARASUCHIA. 
2. Phytosaurus buceros Cope. 
Of this species there is but one skull, without lower jaw (No. 2318). 
It is nearly complete (Fig. 11), only the top of the snout being missing. 
Its length is now 70 cm. In Cope’s time there still existed posterior teeth 
SSS 
“0 
Uy 
LYALL 
\‘awoece’ 
Fig. 11. Phytosaurus buceros Cope. Skull, type specimen; a from left side, 6 from 
right side, c from above, d from behind.  X }. 
