Dideroceras glauconiticum (HEINRICHSON, 1935) Paroistodus originalis Zone, Volkhovian , erratic boulders, Poland.

1. Phragrnocone in ventral (a) and lateral (b) views, ZPAL N j02 5; boulder E- 116, Rozewic.

2. Medial section through a phragmocone, IG 8. H. 265; Opatow,

3. Transverse section through a phragmocone at the mid-length of the specimen, ZPA L Nj030 ; 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 j039 ; boulder E-228, Miedzyzdroje ,

6. Transverse section through a phragmocone at the mid-length of the spiculum, ZPAL N j032 ; boulde r E- 11 6. Rozewie.

7. Medial section through spiculum of a phragmocone , ZPAL N j094 ; 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: Opatów..

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

a Reconstruction of apical part of thephragrnocone ;

b-j section through apical part of a shell, x 2; b ZPAL Nj032 (pI. 2 :6) , bould er E-222, Miedzyzdroje,Poland; c IG 8. n. 256; d ZPAL Nj031, boulder E-1I6, Rozewie, Poland; e IG 8. n. 256a;/ ZPAL N/040, boulderE-228, Miedzyzdroje; g ZPAL N/03 9 (pI. 2: 5), same boulder; Iz ZPAL N/033, boulder E-1I6, Rozewie; i ZPALN/030 (pl, 2: 3) same boulder; j ZPAL N/087, boulder E-I04, Miedzyzdroj e ;

k-l section through siphuncle; k IG 8. n.256b; lIG 8. n. 264 (pI. 2: 9).