Fauna and Stratigraphy of the Stormlerg Series. 365 



broadening of its dorsal half. The coracoid has the general shape 

 seen in the Crodilia; but an even greater departure from the rounded 

 bone of the Pseudosuchia and Phytosauria is presented by the 

 coracoid of Sphenosuchus, described in this paper, which is undoubt- 

 edly a Pseudosuchian of rather advanced type. In the possession of 

 an interclavicle and the absence of clavicles Notochampsa agrees with 

 the Crocodilia and differs from the Dinosauria, Phytosauria, and 

 earlier Pseudosuchia. 



The fore-limb is not Crocodilian in structure. The humerus in 

 its expanded proximal portion with concave anterior surface, its 

 deltopectoral crest well below the level of the head of the bone, and 

 its narrow shaft is reminiscent of that of Stagonolepis which, however, 

 departs from the normal Phytosaurian form and approximates to 

 that of the Pseudosuchia and Saurischia. 



The long and slender limbs show affinities with such forms as 

 Stegomus and Schleromochlus, although the front limb approximates 

 in length to that of the hind limb much more nearly than in the 

 latter form. The genus herein differs greatly from the Jurassic Crocodilia. 



The armour is peculiar in that it apparently consists only of two 

 rows of scutes along the back. These are broader than long as in 

 Stegomus, Aetosaurus and Dyoplax. Possibly, however, ventral armour 

 was also present. 



With the form described as Pedeticosaurus leviseuri by van Hoepen 

 Notochampsa possesses several characters in common. Both have the 

 snout somewhat elongate, with the nostrils separate, lateral, and 

 nearly terminal. Both have thecodont teeth, of which the two just 

 behind the premaxilla seem to be the longest and strongest. In 

 Pedeticosaurus there is a small antorbital vacuity on the side of the 

 face - - smaller than in other Pseudosuchia - an arrangement which 

 may, as stated above, be present in Notochampsa. There is also a 

 general agreement between the two forms in the broadened distal 

 end of the scapula, the long and slender bones of the upper 1 arm 

 and fore-arm, the elongate carpals, the comparatively short ribs, and 

 the double row of plates down the back. The bone called by van 

 Hoepen the left scapula appears to be more likely to be a coracoid. 

 If that be so, it will agree with the coracoids of Notochampsa in 

 its general shape, having two expanded ends connected by a narrower 

 shaft. The hind leg in Pedeticosaurus is relatively somewhat longer 

 than in Notochampsa. 



The points of agreement are, I think, sufficiently numerous 

 provisionally to place the two genera Notochampsa and Pedeticosaurus 

 in the same family which inust be called the Notochampsidae. This 



