i5b YORKSHIRE TYPE AMMONITES Mar. 



15. AMMONITES BEANII, Simpson 

 (Plate XV) 



Original Description 

 " 65. A[mmonites] Beanii. [M. Simpson, 1843, p. 36.] 



"[ II. With a keel on the back." 

 " a. Outer whorl broad." p. 31.] 



" Depressed ; volutions 4 or 5, inner ones much concealed, outer 

 whorl nearly ^ the diameter, sides flattish, with a row of tubercles along 

 the inner margin ; radii twice bent ; aperture ovate ; diameter 4 inches. 



" This may be readily distinguished from the rest, which have 

 sigmoidal radii, by the row of tubercles on the inner margin of the whorl. 

 I have named it in honour of my friend Mr. W. Bean, of Scarborough, 

 who has long been distinguished as an ardent lover of natural science, 

 and whose indefatigable labours have brought to light a great many 

 interesting fossils of the Yorkshire Coast. I believe it to be from some 

 bed near the jet rock." 



/iaamonai uetaus 



Simpson, 1855, jj, instead of last sentence adds a description of 

 another specimen ; 1884, 113, the same, but adds " U. L., i. Peak." 



Remarks 



Stages, conch, oxycone ; periphery, 3c ; ornament, 5. The partition- 

 band (fig. 2) indicates a strong, high septicarina. 



The combination of such a carina with flexiradii is found in Am. 

 illustris, Denckmann, provisionally attributed to Haugia, (S. Buckman, 

 Mon., p. xi, and 1888, 45). 



The geological position is, presumably, just below the striatulus- 

 shales. The fragment of a small specimen attached is comparable with 

 Brodiceras curvum, S. Buckman, 1898, xxxii. 



Result 



Haugia beanii, Simpson sp., 1843, Whitbian [variahilis-zont], 

 Peak, near Whitby. 



