Volume

Pilsbry, H.A. 1906[-1907]. Vol. XVIII. Achatinidæ: Stenogyrinæ and Cœliaxinæ. Man. Conch. (ser. 2): [i]-xii, 1-357, pls. 1-51. [Jan 1907: pp. [i]-xii] ≡

Parts

1. Pilsbry, H.A., 1906. Part 69, 20 Jan 1906: 1-64, pls. 1-10.
2. Pilsbry, H.A., 1906. Part 70, 10 Apr 1906: 65-160, pls. 11-20.
3. Pilsbry, H.A., 1906. Part 71, 2 Oct 1906: 161-272, pls. 21-34.
4. Pilsbry, H.A., 1907. Part 72, Jan 1907: 273-357, pls. 35-51.