776 General Notes. {July, 
moving the matrix. One of these extends as a broad vertical 
band round the sides, indicating a vertical rim to the lower jaw, 
like that which surrounds some tea trays, and which probably 
represents the tomia of the horny sheath of a bird’s beak. At 
the front of the muzzle its face is sharply undulate, presenting 
the appearance of vertical columns with tooth-like apices. Corre- 
sponding tooth-like processes, of much smaller size, alternate 
with them from the upper jaw. These probably are the remains 
of a serration of the extremital part on the horny tomia, such as 
exist on the lateral portions in the lamellirostral birds. 
General affinities ——The structure of the skull of this species 
adds some confirmation to the hypothesis of the avian affinities 
of the Dinosauria, which I first announced, as indicated by the hind 
limbs, and which Professor Huxley soon after observed in the 
characters of the limbs and pelvis. The confirmation is, however, 
empirical rather than essential, and is confined to a few points. 
One of these is the form and position of the vomer, which much 
resembles that seen in lamellirostral birds. The large develop- 
ment of the premaxillary bone has a similar significance. So has 
the toothless character of that bone and the dentary. 
Among reptiles this skull combines, in an interesting way, the 
characters of the two orders Crocodilia and Lacertilia. The ex- 
tension of the premaxillary above the maxillary, so far as to over 
lap the lachrymal, is unique among Vertebrata, so far as I am 
aware. The free exoccipito-intercalare hook is scarcely less 
‘remarkable. 
Of mammalian affinity no trace can be found. he 
-li 
The 
anterior limbs are small, and were doubtless used occasionally fr 
those of the posterior foot. The inferior presentation 0 í 
e summ! 
nner of 4 
ure of the cervical vertebrae. The general appearance 
head must have been much like that of a bird. this 
he nature of the beak and the dentition indicate, for 
strange animal, a diet of soft vegetable matter. It cou 
eaten the branches of trees, since any pressure sufficie ttached 
comminution would have probably broken the slightly an an 
teeth of the lower jaw from their places, and have scatte oo” 
on the floor of the mouth, It is difficult to understand wre 7 
such a weak spatulate beak could have collected or have “may 
off boughs of trees. By the aid of its dentate horny edge 
