Article: The nautiloid cephalopod order Actinocerida in the British Silurian
Charles Hepworth Holland
Five British Silurian species of the cephalopod order Actinocerida are described: one of Ormoceras, one of Eldroceras, and three of Armenoceras, including A. cygneum sp. nov. Their sparse distribution stratigraphically and geographically is reviewed. There are comments on the endosiphuncular vascular system.