1912.] natural sciences of philadelphia. 521 



Chester Group: 



Delaware County — 



1. Fawkes Run (Newtown) 75° 22' 48" W. x 39° 59' 40" N. 



2. Preston Run 75° 26' x 39° 58' 30" 



3. Bear Hill 75° 23' 20" x 39° 57' 



4. Blue Hill 75° 24' 40" x 39° 57' 



5. Middletown Township — 



(a) Mineral Hill 75° 24' 55" x 39° 55' 10" 



(6) Barrens of Middletown 75° 25' 45" x 39° 55' 45" 



(c) Williamson 75° 25' 40" x 39° 54' 30" 



(d) Glen Riddle 75° 25' 50" x 39° 54' 25" 



(e) Lenni 75° 26' 30" x 39° 53' 50" 



(/) Wawa 75° 26' 30" x 39° 54' 20" 



Chester County — ■ 



6. Serpentine Ridge — 



(a) Paoli 75° 29' W. x 40° 1' 40" N. 



(6) Sugartown Barrens 75° 30' x 40° 1' 



(c) Narrow extension from this, trending west-southwest to 

 Goshenville, the Serpentine Ridge of records. 



7. Cedar Barrens (marked "Cs" 



on Soil Survey) 75° 29' 15" W. x 39° 57' 50" N. 



8. West Chester (Fern Hill) 75° 35' 40" x 39° 59' 



9. (a) Sconnelltown (not la- 



' belled on Soil Survey 75° 37' 30" x 39° 56' 7" 



(6) Strode's Mill (not in- 

 dicated on Soil Survey) 75° 37' 8" x 39° 55' 40" 



10. Brinton's Quarry (not la- 



belled on Soil Survey) 75° 35' 40" x 39° 54' 50" 



11. Marshallton (not labelled on 



Soil Survey) 75° 40' x 39° 59' 



12. Unionville 75° 43' x 39° 54' 40" 



Newcastle County — 



13. Centerville 



State-line Group: 



14. Nottingham Barrens (Ches- 



ter County) — 



(a) Nottingham 76° 1' 30" W. x 39° 44' 20" N. 



(6) Goat Hill 76° 5' x 39° 43' 30" 



15. Other specimens, mainly collected by J. J. Carter, are cited 



from points in southern Lancaster County. 



The emendations of the list of component species require a few 

 changes in the descriptive text: 



Page 545, line 18 — For Aster parviceps pusillus here and through- 

 out read Aster depauperatus. 



