References cited
- Cernosvitov , L. and Evans , A. C. 1947 . “ Lumbricidae ” . In Synopses of the British Fauna. 6. Linn. Soc. 1 – 36 . London
- Southern , R. 1909 . Contributions towards a monograph of the British and Irish Oligochaeta . Proc. R. Irish Ac. , 27B : 119 – 182 .