Studien über die Solenogastres, 1 (Monographie des Chaetoderma nitidulum Lovén) & 2 (Chaetoderma productum, Neomenia, Proneomenia acuminata).
Häftad bok.
Nära nyskick. Sthm 1892. (KVAH) 4to. 80 + 120 pp. + 17 lithographed plates (some of them coloured) + printed wrapper. Near mint.