Researches on the Visual Organs of the Trilobites

by Gustaf Lindström

Fig. 27. Hypostoma 2/1.
» 28. The right macula 10/1. From Christiania, Haakavik, Collection
of Dr. G. Holm.

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.