EXPLANATION OF PLATE VII 
Both types have a very rudimentary frontal horn core at H. 
Fig. 4. Teleoceras bicornutus Osb. 
Middle Miocene of Colorado. Its first appearance, apparentlv as a migrant from Europe. 
Fig. 2. Teleoceras aurelianensis. 
Lower Miocene of France (Sables de lOrléanais). 
