54 



ANIMAL ENVIRONMENT 



IV. Pond Communities (chap. viii). 



Station 32. Young ponds, Pond i, Buffington, Ind., L.S. & M.S. R.R. 



or P. R.R., 22 miles southeast (i miles east from station). 

 Station 33. Middle-aged pond, Pond 5, Pine, Ind., L.S. & M.S. R.R., 



24 miles southeast (pond at rear of station). 

 Station 34. Middle-aged pond, Pond 7, Pine, Ind., L.S. & M.S. R.R., 



24 miles southeast (pond to the right in front of station). 

 Station 35. Mature pond, Pond 14, Clark Junction, Ind., P. R.R., 



23 miles southeast (the fourth pond south of bridge over 

 P. R.R. tracks). 



Station 36. Late mature pond, Pond 30, Clark, Ind., P. R.R., 25 miles 



southeast (pond parallel with main street and east of school) 

 Station 37. Senescent pond, Pond 52, Cavanaugh, Ind., South Shore 



Electric R.R., 27 miles southeast. 

 Station 38. Prairie ponds, Roby, Ind., 26 miles southeast, east side of 



Wolf Lake, between second and third icehouses. 

 Station 39. Morainic pond or small lake, Butler's Lake, Libertyville, 111., 



C.M. & St.P. R.R., 36 miles northwest. 



B. Temporary Pond and Swamp Communities. 



AQUATIC PHASES (CHAPS. VIII AND x) 



Station 40. Young artificial temporary ponds, Pine, Ind., L.S. & M.S. 



R.R., 24 miles southeast (ponds i mile northwest of station). 



Station 41. Middle-aged temporary ponds, Pine, Ind., L.S. & M.S. R.R., 



24 miles southeast (ponds i mile northeast of station). 

 Station 42, Prairie temporary ponds, south of Jackson Park, I.C. R.R., 



South Chicago Branch to Bryn Mawr, 10 miles south. 

 Station 43. Prairie temporary ponds, 8ist St. and Stony Island Ave., 



electric railway from 63d St. and Jackson Park Ave., south. 

 Station 44. Temporary pond of prairie type, but being captured by 



shrubs, Pond 90 or 93, Ivanhoe Station, L.S. & M.S. R.R., 



to Gibson, Ind., and G. & I. R.R. to Ivanhoe (i mile 



south of Ivanhoe), 36 miles southeast. 



C. Marsh, Forest Margin, and Prairie Communities 



Station 45. Low forest margin (see Station 30). 



Station 46. Intermediate forest margin, Beverly Hills, C.R.I. & P. R.R., 



12 miles southwest. 

 Station 47. High prairie, Chicago Lawn, 63d St. electric railway, 



ii miles southwest. 

 Station 48. High prairie (some low prairie), Riverside, 111., C.B. & Q. 



R.R. or LaGrange electric railway, 12 miles west. 

 Station 49. Temporary forest pond of early stage, Pond 93, near 



Station 44. 



