PLATE LXXXIV. 



Fig. 1. Stephanoceras commune, Sowerby. 



2. — — — 



4. Harpoceras striatumjm, — 



Stephanoceras annulatum, — 



Side view, natural size. My collection. 

 Front view of the same shell. 

 Suture line highly magnified. 

 Side view, natural size. My collection. 

 Collected by myself from the " Lytoceras 

 Jurense zone," Peak. 

 Side view, natural size. My collection. 

 Collected from the " Lytoceras Jurense 

 zone" at Frocester Hill. 

 Siphonal area, showing keel and costae. 



My collection. 

 Side view, natural size. My collection. 

 Front view of same shell, with oral aperture. 

 Portion of the suture line magnified. 



