Orthoceras cf. regulare Schlotheim, 1820 from Lasnamagian and Uhakuan, erratic boulders of Baltiic origin, Poland. 1. Longitudinal section through a phragrnocone,  from boulder E- I44, E. lindstroemi Zone, Uhukuan, Orłowo. 2. Phragmocone in lateral view (a), longitudinally broken its adult part (b), a part of the specimen  (c) and section through the adapical part (d); erratic boulder E- 141, E. reclinatus Zone, Lasnamagian, Międzyzdroje. 3. Phragmocone in lateral (a) and ventral (b) views; erratic boulder E-236, E. robustus Zone, Garcz.

Orthoceras cf. regulare Schlotheim,1820; reconstruction of a phragrnocone fragment, boulder E-141, E. reclinatus Zone, Lasnamagian, Międzyzdroje.

Orthoceras cf. regulare SCHLOTHEIM, 1820 Longitudinal section through a piliagmocone ZPAL N/434 ; erratic boulder, Llanvirnian, Orłoowo Poland ;