1915.] ‘von Huene, Reptiles in Cope Collection. 491 
with compressed denticulate crowns, but they are not present now. The 
preservation of the skull, in details, is rather rough and hardly shows any 
sutures, but the external form is very well seen. Cope also described the 
braincast. : 
The arrangement of the openings is most like that of Phytosaurus, 
especially P. kapffi. The nares are as in that form above the middle of the 
preorbita. In Mystriosuchus and in Rutiodon the lower temporal fenestra 
is much bigger and broader than in Phytosaurus kapffi and in this species. 
The same is to be said of the upper temporal opening. Here it is not visible 
from above in contrast to Mystriosuchus and Rutiodon and is still more 
different from Paleworhinus and far more from Mesorhinus. Angisto- 
rhinus is of the Mesosuchus type. The nasal openings are little broader than 
in Phytosaurus kapffi; they are not situated in a special elevation, as, for 
instance, they are in Angistorhinus, but their borders lie nearly in the same 
plane as the frontals and the posterior medial part of the nasals; they are 
only slightly inclined forward. In front of the preorbital openings the 
snout becomes very much compressed and raises higher than the anterior 
border of the nares. The protuberance has a length of about 25 em. from 
the border of the nates; from that point the snout is low as in Mystriosuchus, 
Rutiodon, Angistorhinus and Paleorhinus. Only 14 cm. of that part are 
still preserved and I suppose, for reasons given below, that 10 more centi- 
meters are missing of the original extremity of the snout. I think I am able 
to trace the anterior end of the maxille from the palatal side, because on 
the right and on the left side I see the suture obliquely crossing the ridges 
inside the alveoli, but at the place where it should cross the tooth-line 
there is a break on both sides filled up with plaster. But there can hardly 
be a doubt about the very end of the maxilla. The-meost anterior two or 
three alveoli of the maxilla are a little smaller than the others in front and 
behind. I count 23 alveoli in the maxilla, 15 or 16 more alveoli are pre- 
served in the premaxilla (one side). In Phytosaurus kapffi and in Mystrio- 
suchus planirostris and plieningeri there is about the same number of teeth 
in the maxilla and in the premaxilla. From the great resemblance to 
Phytosaurus kapffi I suppose the same is true in this species, which makes 
7 or 8 teeth, or about 10 centimetres missing. In restoring the snout 
in this manner the aspect will be very different from what Jaekel thought 
in Sitz. ber. Ges. naturf. Freunde, Berlin. No. 5, 1910, p. 215, f. 8. The 
high and the low part of the snout are of about equal length. 
Phytosaurus buceros is not so primitive as Paleorhinus, because the snout 
is relatively longer and the nares are situated farther back, but not so far as 
Jaekel suggests. Palworhinus seems to be what we should postulate for 
the precursor of Angistorhinus, Rutiodon and Mystriosuchus, though it is 
