 Beddard became lecturer in biology at Guy's Hospital, examiner in zoology and comparative anatomy at the University of London, and lecturer in morphology at Oxford University.Apart from his publications on wide-ranging topics in zoology, such as Isopoda, Mammalia, ornithology, zoogeography and animal coloration, Beddard became particularly noted as an authority on the annelids, publishing two books on the group and contributing articles on earthworms, leeches and also on another phylum of worms, the Nematoda for the 1911 "Encyclopædia Britannica", where he used the initials "F.E.B.