Keywords: PZSL1889Page443.png Derro cf perrieri Birmingham Dero cf obtusa <small>Udekem 1855</small> en Spermatheca of an unidentified tubificid oligochete worm from Birmingham England sp sperm Proceedings of the Zoological Society of London http //archive org/details/proceedingsofgen89zool vol 1889 issue 4 http //archive org/stream/proceedingsofgen89zool page/443/mode/1up page 443 1889 published 1890 Frank E Beddard text PD-old-70-1923 PZSL 1889-4 Naididae Oligochaeta anatomy Birmingham Animals of the West Midlands Unidentified Haplotaxida Animal male reproductive system |