The arrangement of the lettering is reproduced with an Etruscan Unicode font; it's a transcription and does not directly imitate the shape or placement of the individual letters.

Note that many of the readings are highly uncertain and different authors will give different reconstructions. The readings in this particular diagram are those of Alessandro Morandi, Nuovi lineamenti di lingua etrusca, Massari, 1991. (note that they are not taken from the publication directly, but via this pdf document (pp. 63-65) at etruschi-tirseni-velsini.it and need to be verified c.f. also Nancy Thomson De Grummond, Etruscan Myth, Sacred History and Legend (2006), p. 50).

sixteen "houses" on the circumference, beginning in the "north" (on the right-hand side on this diagram) and running clockwise

1. tin/cil/en

2. tin/θvf

3. tins/θne(θ)

4. uni/mae

5. tec/vm

6. lvsl

7. neθ

8. caθ

9. fuflu/ns

10. selva

11. leθns

12. tluscv

13. cels(c)

14. cvl alp

15. vetisl

16. cilensl

eight items in "tabular" arrangement (bottom right)

17. tur

18. leθn

19. la/sl

20. tins/θvf

21. θufl/θas

22. tins/neθ

23. caθa

24. fuf/lus

four items on the elevated "wedge"

25. θvnθ(?)

26. marisl/latr

27. leta

28. neθ

two items to the left of the "wedge"

29. herc

30. mar

six items in "circular" arrangement on the left

31. selva

32. leθa

33. tlusc

34. lvsl/vel(x)?

35. satr/es

36. cilen

two on either side of the semi-circular structure in the center

37. leθam

38. meθlvmθ

two at the point of the "wedge", to the left of the "tetrahedron" structure

39. mar

40. tlusc