Beddard, F.E. (1886). Descriptions of some new or little-known Earthworms, together with an account of the variations in Structure exhibited by Perionyx excavatus, E.P. Proceedings of the Zoological Society of London. (1886): 298-314.
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Beddard, F.E.
1886
Descriptions of some new or little-known Earthworms, together with an account of the variations in Structure exhibited by Perionyx excavatus, E.P.