Cybele bellatula Dalm. p. 52.
Fig. 2. The hypostoma 3/1. Vestanå, Östergötland.
Dalmanites sclerops Dalman p. 54.
Fig. 3. The hypostoma 2/1.
Encrinurus punctatus Wahlenb. p. 56.
Fig. 4. Horizontal Section of an eye 69/1. Diameter
of the prisms 0,04 mill., their length 0,07 millim.
» 5. The hypostoma 3/1.
» 6. The left macula. Reflected light 12/1.
» 7. Part of the left macula in transmitted light 20/1.
The black streaks are sectioned pores. Spec. BH.
» 8. Vertical section of the right macula, a sagittal
section 20/1. BH.
» 9. A similar one a along the shorter diameter 20/1.
Specimens 5, 6 from Vikers Boge, 4, 9 Medebys, Hall,
7, 8 Svarfvarehuk. All from Gotland.
Encrinurus lævis Ang. p. 56.
Fig. 10. Horizontal section of the cephalic eye.
» 11. Vertical section of the same. Both 60/1.
Prisms 0,05 in breadth, 0,06 in length. Specimen
from Wisby.
» 12-17. Longitudinal profiles and anterior margins of the
hypostomas of Encr. punctatus (figs. 12, 13),
E. obtusus (figs. 14, 15) and E. lævis (figs. 16, 17).
Harpes vittatus Barr. p. 31.
Fig. 18. The two ocelli at right 8/1.
» 19. Sagittal Section of two ocelli 60/1. Specimen from Lochkow
E, e^2, Bohemia.