Homalonotus Knighti König p. 57.
Fig. 20. The hypostoma 3/2.
» 21. The right macula, from the interior side in transmitted
light 20/1. From Scania.
Illænus chiron Holm p. 58.
Fig. 22. Horizontal Section of an eye.
» 23. Vertical section of the same, both 60/1. Spec. AG.
» 24. Hypostoma 2/1. Spec. AF.
» 25. The right macula seen in reflected light. The lenses
translucent 12/1. Ex. AA. All from Persnäs, Öland.
Illænus Esmarki Schloth. p. 511.
Fig. 26 & 27. Horizontal sections of the eyes in two different
specimens 60/1.
» 28. Vertical section of an eye 60/1.
» 29. Likewise, a the eye, b a portion of the
cheek 12/1.
» 30. Hypostoma 2/1.
» 31. The inside of the right macula 12/1. Spec. AR.
» 32. The outside of the left macula in transmitted light 60/1.
» 33. Sagittal section of the macula (a) 60/1.
All specimens from Vestanå, Östergötland, excepting
fig. 30 belonging to Dr. Holm, from
Norway, Bjerkaas.
Illænus gigas Holm P. 59.
Fig. 34 & 35. Surface views of the prisms of the eyes, fig. 34 at
the superior margin and 35 at the inferior one 12/1.
» 36. Cast of the inside of a hypostoma 1/1. Same original as
Holm's fig. 6 Tafl. I, Illænider.
» 37. Cast of the inside of the left macula. Same specimen 12/1.
Illænus Roemeri Vollborth (Ill. vivax Holm) p. 59.
Fig. 38. Hypostoma 1/1. Spec. AO.
» 39. The right macula; the lenses translucent in reflected light
12/1. Spec. AO.
» 40, 41. Both maculæ of another, larger specimen 12/1. Sp. AP.
From the Leptæna limestone of Dalecarlia.
Illænus sphæricus Holm p. 59.