PLATE LXXXVII. 



Zone of Step/i 



wnoccras con/unn/r 



Fig. 1. Stephanoceras Raquinianum, qV Orbigny. Natural size, showing the siphonal 



area and transverse costse. Stinch- 

 combe. Upper Lias Clay. My 

 collection. 



2. — — — Side of the same fossil, natural size. 



3. — — — Front view, showing transverse cos- 



tation and oral aperture. 



4. — — — Wide siphonal area, natural size. 



Stinchcombe. Upper Lias Clay. 

 My collection. 

 Side view, natural size. Stinch- 

 combe. My collection. 

 Siphonal area of the same shell. 

 Side view, natural size, with fine 

 costse and small tubercles 

 Stinchcombe. My collection. 

 Siphonal area of the same fossil. 

 Shell preserved, natural size, from Upper 

 Lias, Chipping Warden, Northampton- 

 shire, where it is known as Am. 

 Holandrei, d'Orbigny. 

 Side view, natural size, of the same fine 

 specimen in the collection of Mr. Edwin 

 A. Walford, F.G.S., Banbury, who 

 kindly communicated it for figuring in 

 this work. 



Braunianum, — 



Raquinianum, 



commune, 



10. — 



