Part 27

=Olenus= sp. p. 33.

Fig. 29. A part of the free cheek with the scallop 6/1. » 30. Profile of the scallop. Andrarum, Scania.

=Parabolina spinulosa= WAHLENB. p. 33.

Fig. 31. The free cheek with the scallop 3/1. » 32. Profile of the scallop. From Jemtland.

=Paradoxides oelandicus= ANGEL. p. 64.

Fig. 33. Hypostoma 2/1. » 34. The left macula 12/1. Öland, Torp.

=Phacops cephalotes= BARR. p. 65.

Fig. 35. The hypostoma; the shell mostly decorticated and the maculæ visible as casts on the inside. » 36. Cast of the inside of the right macula 12/1. Spec. from Lochkow, Bohemia.

=Phacops quadrilineata= ANGEL. p. 66.

Fig. 37. Horizontal section of cephalic eye near the inferior margin 30/1. The dark points lie in the outermost stratum of the cheek. » 38. Vertical section of cephalic eye 20/1. An irregularly hexaedral crystal below each lens. Specimen from Wisby a.

K. Sv. Vet. Akad. Handl., Bd 34, No 8.

Lindström: Trilobites. Pl. V.

G. Liljevall del.

Ljustryck af Chr. Westphal Stockholm.

Pl. VI.

=Phacops macrophthalmus= BURM. p. 65

Fig. 1. Horizontal section of the cephalic eye 30/1. » 2. A similar one near the inferior margin, a cheek 30/1. » 3. Vertical section of a cephalic eye 30/1. » 4. A similar, twice as much enlarged 60/1. » 5. Also a similar, a cheek 30/1. » 6. Hypostoma 2/1. Spec. EA. » 7. The wings of the hypostoma, seen without foreshortening 4/1. EA. » 8. The diminutive right macula 12/1, surrounded by incoherent terrace lines. » 9. The left macula 12/1. Specimens from Gerolstein Eifel, Devon.

=Acaste= sp.? p. 51.

Fig. 10. The hypostoma 8/1. From Mulde, Fröjel, Gotland.

=Phaëtonides Stokesi= MURCH. p. 66.

Fig. 11. Hypostoma 4/1. Gotland, Eksta, Djupvik.

=Phillipsia= sp. p. 66.

Fig. 12. A portion of the cephalic eye 20/1. » 13. The hypostoma 4/1. » 14. The right macula 12/1. Specimen from Beeren Eiland, Oswalds förberg, communicated by Hr. J. G. ANDERSSON.

=Phillipsia= sp.? p. 66.

Fig. 16. The hypostoma 3/1. » 16. The right macula 12/1. » 17. Horizontal section of the cephalic eye 60/1. » 18. Vertical section of the cephalic eye, a cheek 60/1. Probably from the Carbon of Belgium.

=Proetus concinnus= DALM. p. 67.

Fig. 19. Horizontal section of the cephalic eye, a little oblique, at right the innermost stratum with the rock 60/1. » 20. Vertical section of the cephalic eye. The diameter of the prisms 0,03 millim. » 21. Hypostoma 4/1. » 22. The right macula 12/1. » 23. The same with a light, transparent spot 12/1. Specimen from Djupvik, Eksta.

=Proetus conspersus= ANG. p. 68.