Part 28

Fig. 24. A portion of the cephalic eye 20/1. » 25. The hypostoma. Cast of the interior side 4/1. » 26. Cast of the interior side of the left macula 12/1. Fig. 24 from Öja, Gotland, the others from Kräklingbo.

=Proetus signatus= LDM. p. 68.

Fig. 27. Hypostoma 4/1. » 28-30. Three pair of maculæ with dark ocelli in a white spot.

=Ptychopyge angustifrons= DALM. p. 69.

Fig. 31. Horizontal section of the cephalic eye 250/1. » 32. Hypostoma, a broad variety 1/1. » 33. Another, a narrow variety 1/1. » 34. The left macula of the hypostoma fig. 32 4/1. » 35. A similar of the narrow variety 4/1. » 36. Vertical section of a macula. a the macula 20/1. Specimens from Vestanå and Kungs Norrby, Östergötland.

=Ptychopyge cincta= BRÖGGER p. 69

(according to FR. SCHMIDT. The figure 12 a of BRÖGGER resembles, however, the hypostoma of Pt. angustifrons, but not the hypostomata which have been prepared from the Ptych. cincta).

Fig. 37. A hypostoma; the maculæ are directed obliquely 2/1. » 38. The right macula of another specimen 4/1. » 39. Vertical section of a macula 60/1. Specimens from Kungs Norrby, Östergötland.

=Ptychopyge aciculata= ANG. p. 68.

(Compare BRÖGGER II Taf. I, fig. 13.)

Fig. 40. The hypostoma, cast of the interior surface 1/1. » 41. Cast of the right macula 4/1. Specimen from Öland, Brunsby.

=Ptychopyge glabrata= ANG. p. 69.

Fig. 42. Original of BRÖGGER'S fig. 14. Cast of the inside of the right macula 4/1. Ǎlleberg.

=Elyx laticeps= ANG. p. 19.

Fig. 43. The interior surface of the right fixed cheek and the glabella. Magnified. Specimen from Andrarum. 4/1.

=Conocoryphe= p. 19.

Fig. 44. Cast of the interior surface of the left cheek. Magnified. From Andrarum. 4/1.

=Solenopleura brachymetopa= ANGEL. p. 19.

Fig. 45. The head shield, cast of the interior surface. Magnified. Specimen from Andrarum, Scania. 4/1.

=Apus cancriformis= SCHÄFFER p. 73.

Fig. 46. The hypostoma from the outside 8/1. » 47. The same from the inside 8/1. » 48. A side view of the same, 8/1. a the duplicature of the head shield, b posterior integument of the hypostoma, c the ventricle, d the mouth. » 49. The right white spot at the posterior margin of the hypostoma, seen from the outside in transmitted light 150/1.

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

Lindström: Trilobites. Pl. VI.

G. Liljevall del.

Ljustryck af Chr. Westphal Stockholm.

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Transcriber Note

Minor Typos were corrected. Inconsistencies in capitalization and abbreviations were left as printed.