Explanation of Plate I. 



Unless otherwise stated, the specimens delineated are compressed. Direction of lateral 

 pressure is indicated by arrows placed on either side of the figures. 



Rastrites peregrinus Barrande. 



Fig. 1 — 8. Natural size. Colonie Haidinger. 

 » 9. » » Klubbudden. 



* 10, 11. » » Kongslena. 



' 12. » > Nyhamn. 



» 13. » » Tomarp. 



» 14. » » Kallholn. 



» 15—17. » » Garpel Glen. 

 > 18. » » Dobb's Linn. 



» 19. » * Fragments converted into pyrites. Skellgill. 



s 20. Initial portion X 4. Colonie Haidinger. 

 » 21. Distal part X 4. Ibid. 



Originals collected by the Author. 



Rastrites peregrinus Barrande, var. hybridus Lapworth. 



Fig. 23. Natural size. Imprint of a specimen preserved in faint relief. Enån. 

 » 24. Distal part of the same specimen X 3. 5. 

 Original collected by the Author. 



Rastrites peregrinus Barrande, var. peeten. n. v. 



Fig. 25. Portion of a slab, showing different parts of the rhabdosome; natural size. Dobb's Linn. 

 » 26. Distal part of one of these specimens X 4. 

 Original collected by the Author. 



Rastrites peregrinus Barrande, var. soeialis n. v. 



Fig. 27—31. Natural size. Böhmsdorf. 



Originals collected by the Author. 



Rastrites approximatus Perner, var. Geinitzi n. v. 



Fig. 32. Natural size. Pausa. Collected by the Author. 

 » 33—35. » » Raitzhain. Collected by Mr. Eisel. 

 » 36. » » Grobsdorf. Collected by Mr. Eisel. 

 » 37—39. » » Thierbach. Collected by the Author. 

 » 40. » » Altmannsgrün. Collected by Mr. Eisel. 

 » 41. Distal part X 3. 5. Altmannsgrün. Collected by Mr. Eisel. 



