Neodrilus agilis n.sp. is the second species of the genus, and is distinguished from N. monocystis, Beddard, 1887, by the possession of two pairs of calciferous glands, situated in segments XIV and XV, and by many small diverticula of the spermatheca clustered around the spermathecal duct.
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LEE, K. Asymmetry of the Reproductive Organs in the Earthworm Neodrilus agilis. Nature 163, 951 (1949). https://doi.org/10.1038/163951a0