794 THE AMERICAN NATURALIST. | [Vor. XXXIV. 
of this animal to that of a dinosaur. It is further to be noted 
that, while the forearm is extremely long, the metacarpals are 
shorter than the metatarsals, which are decidedly long and slen- 
der; the skull and shoulder girdle are unfortunately unknown ; 
the number of dorsals is estimated at twenty; there are two 
sacrals. While the ectepicondylar foramen of the humerus 
points in the direction of the lizards (in distinction from 
Palzohatteria, with its entepicondylar foramen), there is no 
I 
: B A 
Sq 
Fic..11.— Limbs of Proganosauria. 
Palzohatteria. A short-limbed, probably Kadaliosaurus. A long-limbed, pres terres- 
amphibious type. Left hind limb. Re- trial and active type. Metatarsals longer than 
stored by McGregor, after Credner. metacarpals. After Credner. 
question that we have here a type which comes very near the 
dinosaur atavus. The fact that the humerus and femur are of 
the same length accords with the condition characteristic of 
the early Cetiosauria, for the Cetiosaurus of Oxford has a 
humerus and femur of nearly equal length. 
The foot structure of Palæohatteria, as restored from Cred- 
ner's plates by Dr. McGregor (Fig. 11), fulfills all the required 
ancestral conditions, both for dinosaurian and avian ancestry. 
Granting, therefore, for the sake of argument, the hypo- 
thetical value of the Proganosauria in the largest sense as 
