Dideroceras glauconiticum (HEINRICHSON, 1935) fro,
Paroistodus originalis Zone, Volkhovian , erratic boulders in 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; Opatow,
3. Transverse section through a phragmocone at the mid-length of the specimen, ZPAL N/030 ; boulder E-116. Rozewie.
4. Medial section through a phragmocone, IG 8. 11. 267; Opatow.
5. Medial section through spiculum of a phragmocone , ZPAL N/039 ; bould er E-228, Miedzyzdroje ,
6. Transverse section through a phragmocone at the mid-length of the spiculum, ZPAL N/032 ; boulder E- 11 6. 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. 11. 258a ; Opatow.
9. Phragmocone in ventral view, IG 8. 11. 264: Opatow.

Dideroceras glauconitum (HEINRICHSON, 1935) from P. originalis Zone, Volkhovian;

a Reconstruction of apical part of the phragrnocone;

b-j section through apical part of a shell, x 2;

k-l section through siphuncle.