Fauna and Stratigraphy of the Stormberg Series. 369 



bone by a narrow neck. There are two other bones of which the 

 one articulating with the calcaneum may be the cuboid and the 

 other the reduced fifth metatarsal or the fused 4th and 5th tarsalia. 



Metatarsus. Metatarsals I IV are similarly elongated narrow 

 cylindrical bones with slightly expanded ends. The 2nd and 3rd 

 are larger than the others, while the 4th is the shortest. The lengths 

 from the 1st to the 4th are 22 mm., 23 mm., 23 mm., and 20 mm. 

 respectively. 



One phalanx of the 2nd. digit and two phalanges of the third are 

 preserved. Each is a fairly long slender bone with concave proximal 

 and convex distal articulation. 



Armour. Portions of the dorsal and ventral armour are preserved. 



One of the dorsal plates has been figured by Dr. Broom. It has 

 a width of 13 mm., and a length of 8 mm. in the middle line. 

 Its dorsal surface is pitted save for the portion overlapped by the 

 anterior plate. At the outer sixth the plate is bent downwards, 

 the bend being strengthened by a dorsal ridge. The total width of 

 the body was probably about 25 mm. The ventral plates are paired, 

 but are smaller and more numerous than the dorsal plates, in the 

 abdominal region each was about 9 mm. wide and 4 mm. long, 

 while in the caudal region they were smaller. 



The two forms described by Dr. Broom as Notochampsa were 

 included in the one genus on account of resemblances between the 

 dorsal plates. Further investigation shows that while the pelvis in 

 k 'iV. longipes" is typically Crocodilian the skull of JV. istedana shows 

 features which remove it from the true crocodiles. The question 

 then arises, are the two forms congeneric? Dorsal plates are known, 

 not only in the Crocodilia, but in the Pseudosuchia such as Scidero- 

 tnochlus, Aetosaitrus, and Euparkeria; and it is doubtful whether they 

 can be considered of generic importance. Unfortunately the pelvis 

 is absent in the type of N. istedana and also in the allied type 

 Pedelicosaurus. if Broom's N. longipes is to be kept in the genus 

 Notochampsa then the genus must be considered to be characterised 

 by the possession of a skull differing from that of a true Crocodile 

 and of a typically Crocodilian pelvis. This is not impossible; but 

 until more is known of these forms it would seem best to separate 

 the two forms from one another, classing istedana as one of the 

 higher Pseudosuchians and erecting, as above, a new genus Erythro- 

 champsa for the more truly Crocodilian Erythrockampsa longipes. 



Type. S. Af. Mus. N". 445 f. 



Locality. Eagles Crag, Barkly East, C. P. 



Horizon. Red Beds. 



