SUMMARY: Ammonoids from the late Asbian (B2b Assemblage Biozone) Cracoean buildups or reefs of the Peak District
Derbyshire and Staffordshire, England) are revised.  Utilizing new collections and additional museum material, enhanced
descriptions and illustrations are possible.  Details of conch morphology, growth characteristics, suture development and
shell orrnament are presented for species belonging to the genera Bollandites, Bollandoceras, Beyrichoceras, Goniatites, Sygambrites, Nomismoceras and Prolecanites. The new species Bollandites rileyi sp. nov., Bollandoceras fordi sp. nov., Bollandoceras crowdecotense sp. nov. and Sygambrites mundyi sp. nov. are described.  A neotype is proposed for
Bollandites castletonensis and a lectotype for Beyrichoceras delicatum.