364 Annals of the South African Museum. 



an expanded end, which was probably slightly cartilaginous. The 

 preserved portion of the bone is 48 mm. long, and the distal end 

 measures !)-"> mm. in its greatest diameter. The shaft at its narrowest 

 is between T> and 6 mm. thick. The outer condyle is larger than 

 the inner and on the anterior surface between the two is a shallow, 

 broad depression. 



The tibia and fibula are both long, slender bones, longer and more 

 robust, however, than the bones of the lower part of the fore-leg. 

 The tibia has a length of 62 mm. Its shaft is long and straight : 

 the proximal end of the bone is swollen to a thickness of 6-5 mm., 

 and rounded. The distal end is somewhat crushed, but it is wider 

 than the proximal end and lias a protuberance on the fibular side. 

 The fibula is a more slender bone, 60 mm. long, with slightly 

 expanded ends. 



Armour. The back was covered with a series of paired dorsal 

 scutes, one of which was figured by Broom. There were apparently 

 neither lateral nor ventral ossifications - - at least, none are preserved 

 on this specimen. Each pair of scutes covered one vertebra. Remains 

 of 1 20 pairs are preserved, almost wholly as impressions of the under 

 surface of the bone. Each scute was roughly rectangular, but towards 

 the outer end of the posterior border there was a projecting process. 

 Krom the twelfth pair onwards the width gradually decreases. The 

 first scute is short, the second slightly longer-. The Mrd is a little 

 longer than the 4th or 5th. Krom this onwards the length is 

 constant. The 11th. scute is t2() mm. broad and 9'5 mm. long at 

 its inner edge. The 19th. has a breadth of 1 i-5 mm. and a lenglh 

 of 9 mm. 



Affinities. In the elongation of the rostrum the form agrees with 

 the Crocodilia and Phytosauria : but in the possession of paired and 

 lateral outer nares it diflers from the former, and in the short 

 premaxillary and forward position of the nostrils from the latter. 

 The elongation of the rostrum is a secondary character. 



I am not able to determine with absolute satisfaction whether or 

 not a preorbital vacuity was present. The orbit itself is absent, hut 

 both prefroiitals can be seen. On the right hand side below r the 

 pref rental on the side of the skull there is a distinct depression with 

 superior, anterior, and inferior borders of bone. This may - and 

 probably does represent a preorbital vacuity, looking wholly 



outwards and placed below the orbit and but slightly in advance of 

 it, a condition paralleled to a certain extent in the Phytosaurians 

 Mystriosuchus and Ehi/tidodon. 



The scapula is without parallel among Archosauria in the extreme 



