Pl. I.

Acidaspis crenata Emmr. p. 85.

Fig. 1 & 2. Vertical sections of the eye 60/1.
» 3. The outside of the hypostoma 6/1.
» 4. The anterior margin of the hypostoma, showing
one of the clubshaped spots in transmitted
light 20/1.
» 5. The granulations of the hypostoma in transmitted
light 80/1.
» 6. Vertical section of the hypostoma with granules 60/1.
Specimens from Djupvik, Eksta.

Agnostus glandiformis Angelin p. 35.

Fig. 7. Vertical section of a part of a rolled up specimen 8/1.
Specimen signed CQ. Andrarum, Scania.

Asaphus expansus L. p. 39.

Fig. 8. Horizontal section of the eye near the upper margin.
a. The surrounding spongious zone,
b. The surface of the eye with lenses 60/1.
Spec. CG.
» 9. Horizontal section from the centrum of the eye 60/1. Spec. CF.
» 10. Horizontal section near the inferior margin,
a the eye, b marginal zone, c a portion
of the cheek 60/1. Specim. CF.
» 11. Vertical section near the inferior margin 60/1,
same specimen as in fig. 10.
» 12. Eye fractured vertically showing regular prisms
in the eye (a) and irregular ones in the marginal
zone (b) 30/1.
» 13. Part of the hypostoma with the macula 12/1.
» 14. The right macula from the inside 12/1.
» 15. A vertical section across the hypostoma,
aa the maculæ 8/1.
» 16. A similar one of the macula at left in the
preceding figure 60/1.
» 17. The right macula from the outside in transmitted
light 60/1. Sp. BQ.

Asaphus fallax Dalm.? p. 41.

Fig. 18. Horizontal section of the eye 60/1. Spec. CD.
» 19. Vertical section of the same passing obliquely
through two rows of prisms 60/1.
» 20. Fragment of the same eye with entire prisms 30/1.
» 21. The hypostoma seen from the inside 3/1 from
Sandvik, Öland.
» 22. The left macula 12/1. Spec. BO. From Vestanå, Östergötland.

Asaphus raniceps Dalm. p. 40.

Fig. 23. The left macula 12/1. Spec. BV.
» 24. Horizontal section of right macula 60/1. Spec. BY.
» 25. Vertical section of a macula 60/1.
» 26. A similar section of a macula (a) in the
longitudinal axis of the hypostoma 12/1.
Exterior surface at right.
All from Östergötland.

Asaphus sp. p. 41.

Fig. 27. A portion of the eye near the superior margin 30/1.
» 28. Horizontal section of the eye 60/1.
» 29. Horizontal section near the inferior margin 60/1.
» 30. Vertical section near the superior margin 60/1.
All figures from specimen CE. From Gotska Sandön.

K. Sv. Vet. Akad. Handl., Bd 34, No 8.Lindström: Trilobites. Pl. I.


Click on image to view larger sized.
G. Liljevall del.Ljustryck af Chr. Westphal Stockholm.