Orthoceras  wahlenbergi Boll, 1857 from Volkhovian, erratic boulders of Baltic origin, Poland. 1. Longitudinal section through an adult specimen; P. originalis Zone, boulder E-227, Rozewie. 2. Possibly conspecific specimen; P. originalis Zone, tile from Opatów. 3. Longitudinally broken adult phragmocone; Paroistodus orlginalis Zone, erratic boulder E-251, Wejherowo. 4. Adult specimen; P. originalis Zone, Opatów. 5. Phragmocone; Lenodus variabilis Zone, erratic boulder E-117, Rozewie. 6. Phragmocone  (a) and enlarged part of the shell (b); early Volkhovian, boulder E-186, Międzyzdroje. 7. Phragmocone from Kundan? erratic boulder E-228, Międzyzdroje.

Orthoceras wahlenbergi Boll, 1857;  reconstruction of the phragrnocone after a specimen  from boulder E-117, L. variabilis Zone, Kundan, Rozewie, Poland.