PTA ER 
Ascoceras decipiens n. 
1. Specimen from Sandarfve kulle, lateral view 
and details of ornamentation. 
2. The same, ventral aspect with ornamentation. 
3. Its apex and a. enlargement thereof. 
4. Neck and ornamentation. 
5. Longitudinal section and enlarged figure of 
the apex. 
6. Transverse section of the same. 
7—-8. Sections of another specimen. 
9—10. Sections of a specimen from Linde klint. 
11—12. Various sections, 12 a. especially to show 
the siphuncle. 
13—14. Specimen with the sutures of the septa 
and the same sectioned. 
15. Uncommonly small specimen from Ljugarn. 
16. Transverse section showing the arrangement 
of three septa, the dorsal side up, ventral 
down. 
17. Transverse section across the inferior apex, 
between the septum of the truncature and 
the first sigmoid septum. 
18. Fragment of which three different oblique 
sections have been taken, in order to show 
the different aspects of the siphuncle. 
19. Section along the line A—B of the magni- 
fied section a. of fig. 18. 
20.  Ditto along C—D. 
21. Ditto along E—F, the smaller, black ring 
being the narrow siphonal duct of the Nau- 
tiloid in transverse section. 
22. Longitudinal section of a specimen from Sand- 
arfve kulle with four regular septa above 
the sigmoid ones. 
22a. The same magnified ten times. 
22b. Dorsal portions of the uppermost septa of 
the same. 
23. Specimen from Sandarfve kulle with fragment 
of the Nautiloid in situ. 
24. Longitudinal section of the same and the 
same magnified a. "The siphunele of the 
Fig. 
G. LINDSTRÖM, THE ASCOCERATIDA AND THE LITUITIDA. 
VE 
Nautiloid is seen to continue in the si- 
phuncle of the Ascoceras, in which only 
a single sigmoid septum has been formed. 
25. Part of the same specimen from the ventral 
side showing the different strata of which 
the shell and the septa are composed. 
26. Another specimen of Ascoceras and Nautiloid 
in union from Mannagårda in Lye and its 
ornamentation. 
27. Longitudinal section of the same. 
28. Transverse section of the Ascoceratidan portion. 
Ditto of the Nautiloid. 
30—34. Different fragments of the Nautiloid, 
32—34 from Sandarfve and 30—31 
from Ljugarn, sectioned and with orna- 
mentation. 
Ascoceras sipho n. 
35. Transverse section of the following. 
36. Nucleus from Linde klint with the sutures of 
the septa. 
37. Its neck with ornamentation. 
38. Another specimen, same loc., sutures some- 
what deviating. 
39. Section of the same. 
40. Another specimen, a. apex sectioned. 
41—42. Two different specimens longitudinally 
sectioned, sp. 41 from Linde klint. 
43. Transverse section of fig. 42. 
Glossoceras gracile var. curta BARR. 
44. Apex of a fragment and a. magnified. 
45. The same in transverse section. 
46. Fragment possibly belonging to this species. 
47. Complete specimen from Sandarfve kulle, la- 
teral view with various details. 
48. Same specimen, ventral view. 
49. The aperture from above. 
50—52. Various specimens in longitudinal section 
and magnified. 
sa 
