This is an introduced European species of earthworm. Reynolds (1977) provides the following description: “Length 25-84 mm, diameter 3-5 mm, segment number 120-150, prostomium epilobic, first dorsal pore 4/5. Clitellum, somewhat flared ventrally xxv, xxvi-xxxii. Tubercula pubertatis usually xxix-xxxi. Setae closely paired, AA>BC
CD, anteriorly DD = 1/2C, posteriorly DD= 1/3C. Male pores with elevated glandular papillae in xv with male tumescences extending over xiv and xvi. Seminal vesicles, four pairs in 9-12. Spermathecae, two pairs with short ducts opening near mD line or halfway between mL and d in 9/10 and 10/11. Body cylindrical, except in clitellar region. Unpigmented, but colour appears rosy or greyish when alive, and white when preserved.”
Source: Reynolds, John W. 1977. The Earthworms (Lumbricidae and Sparganophilidae) of Ontario. Life Science Miscellaneous Publications, Royal Ontario Musuem, Toronto, with permission.