Logan Water, 500 yards straight SSW of Logan Ho[use]., [near] Lesmahagow [approx 10km south west, (Lanarkshire), Strathclyde], [Scotland] Patrick Burn Formation, [Priesthill Group, Llandovery], [Telychian], Silurian (M[iddle].) [Lesmahagow Inlier], A member of the Family Loganiidae. Part and counterpart. Formerly referred to as *Thelodus sp.* Traquair and *Logania scotica* (Traquair).