210 



Plate X. 



Cadoceras crassum nov. sp. 

 Fig. 1. View of the external margin of the specimen on Plate IX. 



Olcostephanus Neumatr. {? Simbirskites, Pavlow and Lamplugh.) nov. sp. 



Fig. 2. Fragment of a cast: a) side view, b) the same specimen after a 

 portion of the outer whorl has been removed, so that part of the inner 

 Avhorl is seen, c) view of external margin of the same. Sandstone of «Fossil- 

 locality 2» on Fossil Mountain in the northern part of Jameson's Land. 



Perisphinetes sp. cf. Fanderi d'Orbignt. 

 Fig. 3. A cast, somewhat crushed: a) side view, b) external margin. 

 The cast is in light-coloured sandstone and was found as a loose block in 

 Aucella River in the south-west of Jameson's Land. 



