1946-1966 11 parts in 11. xxxxiv, 372 p., 38 text figures, 41 plates, 4to, paperbound (original blue covers with printed paper label pasted on front. The Palaeontographical Society.With numerous new taxa. From part X (1960) onwards written by Weir alone. A total of 13 parts were published so we lack only the last two. All copies present are in original wrappers and in a very good, clean condition.