Dideroceras glauconiticum (Heinrichson, 1935); Paroistodus originalis Zone, Volkhovian, erratic boulders, Poland. 1. Phragrnocone in ventral (a) and lateral (b) views, ZPAL N /02 5; boulder E- 116, Rozewie. 2. Medial section through a phragmocone, IG 8. H. 265; tile from Opatów. 3. Transverse section through a phragmocone at the mid-length of the specimen, ZPA L N/030; boulder E-116. Rozewie. 4. Medial section through a phragmocone, IG 8. 11. 267; Opatów. 5. Medial section through spiculum of a phragmocone, ZPAL N/039 ; boulder E-228, Międzyzdroje. 6. Transverse section through a phragmocone at the mid-length of the spiculum, ZPAL N/032; boulder E-116. Rozewie. 7. Medial section through spiculum of a phragmocone, ZPAL N/094; boulder E-116, Rozewie. 8. Medial section thr ough spiculum and shell of a phragmocone, IG 8.II.258a, Opatów. 9. Phragmocone in ventral view, IG 8.II. 264, Opatów.