=Chasmops macroura= (?) p. 49. Fig. 10. The left macula, cast of the inside 12/1. Rostock. =Chirurus glaber= ANG. p. 50. Fig. 11. A portion of the surface of the cephalic eye 12/1. From Dalecarlia. =Chirurus ornatus= DALM. p. 50. Fig. 12. Horizontal section of a Cephalic eye near the surface 60/1. » 13. Vertical section of the same, 20/1, at the inferior margin. A line added to show the supposed size of the fragmentary lenses. » 14. The left macula of the hypostoma 12/1. From Östergötland, Westanå. =Chirurus spinulosus= NIECZKOWSKI p. 51. Fig. 15. The right macula of the hypostoma from the inside 12/1. Belongs to Dr. G. HOLM, from Esthonia, Kuckers C^2. =Chirurus= sp. p. 51. Fig. 16. The left hypostomic macula 12/1. Öland, Brunsby kanal. =Cyrtometopus clavifrons= DALM. p. 49. Fig. 17 & 18. Horizontal sections of cephalic eyes 60/1. » 19. Vertical sections of cephalic eyes and a part of the cheek 20/1. » 20. A highly magnified portion of the eye in vertical section 60/1. » 21. Hypostoma, 3/1 the anterior wings completed after another specimen. From Östergötland. =Cyphaspis elegantula= ANGELIN p. 52. Fig. 22 & 23. Horizontal and Vertical sections of cephalic eyes 60/1. Diameter of facets 0,03 mm. » 24 & 25. Hypostomas from the front side and in side view 8/1. Upper Silurian, Gotland. =Ctenopyge pecten= SALTER p. 29. Fig. 26. The head shield, the free cheeks added from other specimens 4/1. » 27. A free cheek, viewed without foreshortening, as in its natural position 4/1. Alumschists of Andrarum, Scania =Ctenopyge= n. sp. (LINNARSSON, Geol. För. Förhandl. 1880, pl. VI, figs. 14, 15) p. 29. Fig. 28. A free cheek 6/1. » 29. Surface of the eyes, near the suture 30/1. » 30. The same next the free cheek 30/1. Andrarum. =Sphærophthalmus alatus= ANG. p. 29. Fig. 31. The head shield; the free cheeks have been added 8/1. » 32. A free cheek without foreshortening 8/1. » 33 & 34. Horizontal and Vertical sections of cephalic eyes 100/1. The cornea nearly 0,01 mm. in thickness. Andrarum. =Peltura scarabæoides= WAHLENB. p. 29. Fig. 35. The head shield; the free cheeks added 2/1. » 36. A free cheek, not foreshortened 4/1. » 37. A cast of the inside of the cephalic eye 20/1. » 38. A portion of the cephalic eye from the inside 60/1. » 39. A portion of the same in transmitted light 100/1. » 40. Vertical section of an eye 100/1. The rock on the inside. » 41. A similar one passing through two rows of lenses, the one behind the other. The rock on the outside 100/1. » 42. A hypostoma 8/1. Andrarum. =Dalmanites imbricatulus= ANGELIN p. 53.