The following is a list of all the localities so far found where the wurtz-ites occur. They are listed from east to west beginning with the Shelocta locality  and ending with the Glouster, Ohio, locality.

1. One half mile northwest of Shelocta, Indiana County, Pa., alongU’ S Route 422.
2. Along U. S. Route 422 about a mile southeast of Elderton, Armstrong County, Pa.
3. Railroad cut along the main line of the Pennsylvania Railroad just east of the small station of Donohoe, about four miles east of Greensburg, Westmoreland County, Pa.
4. Along the old William Penn highway about one quarter of a mile west of Murraysville, Westmoreland County, Pa.
5. Along a branch line  of the Pennsylvania Railroad about two  miles south of the William Penn highway (U. S. Route 22) at Aberc Creekabout eight miles east of Wilkinsburg,  Allegheny County, Pa.

6. Along a secondary road one and one half miles southwest of Murraysville, Westmoreland County, Pa.
7. Old brickyard quarry at Valley Camp, Westmoreland County, Pa.
8. McFettridge quarry, Creighton, Allegheny County, Pa.

9. Glassmere Brick Com_pany quarry at Glassmere, AJlegheny County, Pa.
10. Along Route 28 about a half mile north of Springdale, Allegheny County, Pa.
11. Baltimore & Ohio Railroad cut at Wittmer, about two miles north of Etna, AlIegheny County, Pa and along Route 8.
12. West end of Sewickley bridge opposite from  Sewickley, Allegheny County, Pa.
13. Junction of Flaugherty  Run and the  Shousetown road, one and one half mlles northwest of Sewickley, Allegheny County, Pa.
14. Stanton Park along Route 7 about a mrle and a half north of Steubenville, Jefferson County, Ohio.

15. Old Glouster Brick quarry, one third of a mile south of Glouster, Athens County, Ohio.