96 
FECTEN cinctus. 
TAB. CCCLXXI. 
Spec Char. Orbicular, gibbose, longitudinally 
striated, imbricated ; edges of the laminae, 
thin, erect ; ears small ; edge entire. 
Remarkable for concentric, erect laminae, that are very 
numerous, especially towards the edge ; but from their 
being thin, they are commonly worn off. The ears are 
strongly marked with close ridges : the valves are thick, 
especially towards the hinge, and of nearly equal convex- 
ity. The striae are sunk and rather irregular. 
Dawson Turner, Esq. of Yarmouth, celebrated for his 
botanical knowledge, was the first Friend who sent me 
this interesting shell. It was found in the alluvial clay 
of Suffolk. The specimen figured was sent me from the 
neighbourhood of Horncastle by Mr. Wier, both are 
remarkable for having grains of iron ore, arranged in 
one, two, or three regular rows between the concentric 
laminae, according to the distance of those laminae, the 
grains being uniform in size. It is probable that they 
both belong to the inferior or Ironshot Oolite, although 
the first is filled with indurated marl. 
