A few Productida from the collection :

[Brachioman]

This is Fluctuaria undata (Defrance), from the  Asbian Limestone, Lower Carboniferous, Derbyshire, U.K. An unusual genus with its strong rugation extending over the whole ventral shell. Rather small in size - the largest specimen pictured is about 1.6 cm. long. Quite a rare beast to find complete.

The second species is Buxtonia scabricula (Sowerby). Again from the Asbian near Buxton, Derbyshire. Recognisable with its swollen spine bases evenly distributed on the ventral valve. Medium size. Fairly common.

The third species is Echinoconchus punctatus (Sowerby). Adults larger and having distinctive bands with clustered spine bases, thinning anteriorly. Fairly common but complete specimens not so easy to find. The largest specimen here is 6.5 cm. long. Again from the Asbian of Derbyshire.

[Tidgy's Dad]

Very nice!

Thanks for sharing!