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NATURALIST'S GUIDE TO THE AMERICAS 



and many characteristic invertebrates. 

 Stream badly polluted. 630 to 650 ft.; 

 level. 7. E. Shelford. 



c. North Branch Chicago River Preserves 



*Shermerville Tract. (04.) (Cook 

 County.) 40 acres of oak-hickory-elm 

 woods a third of which is rustic park 

 and the rest is similar to the other 

 wooded tracts; Claytonia and Trillium 

 grow thickly; wood snails and isopods 

 are plentiful. 



20 mi. north of Chicago. C. M. & 

 St. P. R. R. East of the Station. 

 W. C. Allee. 



*Morton Grove Preserve. (B3-C3.) 

 (Cook County.) Oak-hickory forest. 

 On the North Branch of the Chicago 

 river. Relatively uncontaminated 

 water; many crayfishes and fishes. 

 W. C. Allee. 



*Edgebrook Preserve. (C4.) (Cook 

 County.) Oak-hickory forest. On 

 North Branch of Chicago River which 

 is here contaminated to a considerable 

 degree. Otherwise the conditions are 

 similar to those above. W. C. Allee. 



d. Southern Upland Preserves 



* Beverly Hills Forest. (Cook County.) 

 20 acres of deciduous forest and glacial 

 topography, including some swampy 

 brush covered land located in Cook 

 County Forest. 



One-half mile northwest from Beverly 

 Hills. C. R. I. & P. R. R. Chicago, 

 111. 7. E. Shelford. 



*Glenwood Preserve. (C4.) Oak- 

 hickory forest. Thorn Creek is badly 

 contaminated in this region and con- 

 tains practically no life not found in 

 sewage. Butterfield Creek, which is 

 not reserved, is still uncontaminated 

 and is the best example of a normal 

 brook animal community to be found 

 near Chicago. Johnny darters, May- 

 fly nymphs, and caddice-fly larvae are 

 abundant. 



20 mi. south of Chicago. B. & O. 

 suburban line, Glenwood. W. C. Allee. 



*Palos Preserve. (C3.) A large tract 

 with widely varying conditions from 

 swampy thickets to open fields. In 



other places there are wooded ravines. 

 Oaks and elms predominate. In places 

 one finds typical savanna conditions 

 which are in part a result of past farming 

 operations. Conditions are particularly 

 favorable for birds. Moraine ponds are 

 common. 



Palos Park, 111. Wabash R. R. 

 W. C. Allee. 



*Chicago Heights Preserve. (C4.) 

 Deciduous forest. Thorn Creek is here 

 unpolluted. Flood plain thickets and 

 open forest growth of oaks and elms 

 give the general features. 



20 mi. south of Chicago. C. & E. 

 I. R. R. W. C. Allee. 



e. Southern Lowland Preserves 



*Burnham and West Hammond Pre- 

 serves. (C4.) Swampy land in the 

 main, although the West Hammond 

 Preserves have better drainage and 

 support a growth of mixed oaks. The 

 ponds here are largely summer-dry, but 

 in spring there is a heavy frog popula- 

 tion. Salamanders (Ambystoma tigri- 

 num) lay eggs here. The fairy shrimp 

 (Eubranchipus vernalis) and an isopod 

 (Asellus communis) are particularly 

 abundant. 



Reached by various street car lines 

 from 63rd St., Chicago. W. C. Allee. 



pWolf Lake or Lake Calumet. Lakes 

 near Chicago containing such snails as 

 Pleurocera and Vivipara commonly, and 

 mussels in abundance. Waterfowl and 

 several varieties of fish are also present. 

 Pond weeds have been regularly removed 

 by ice companies. 



Reached by various street car lines 

 from 63rd Street, Chicago. W. C. Allee. 



f. Streams 



pFox River. (Elgin to Carpenters- 

 ville Dam.) Good mussel and fish 

 conditions. 



Elgin, 111. A. D. Howard. 



pHickory Creek. (New Lenox to 

 Joliet Park.) One of the few unpol- 

 luted streams in northern Illinois. Has 

 varied conditions and fauna. Should 

 be preserved by the state. 



New Lenox, 111. C. R. I. & P., Joliet 



