ON THE 



SPECIES OF THE GENUS 



RC A. 



INHABITING THE 



NORTHERN SEAS. 



D. F. ESCHEICHT. 



(Read before the Royal Danish Society of Sciences, May 9th, 1862.) 



TEANSLATED FEOM THE 



'Oversigt over det Kongelige Danske Videnskabernes Selskabs Forhandlinger/ 1862. 



