GEOLOGY OF LA SALLE COUNTY. 169 



by the mother. It is sometimes four inches long-. 



The earthwarm Lumbricus terrestris — is found 

 almost everywhere, and is too well known to need 

 description. 



ERRATA. 



Page 18, line 20, at end for Trenton read St. Pe- 

 ters. 



Page 31, line 9 from top, after See read Little 

 Rock. 



Page 39, last line second paragraph, add This is 

 the Drift. 



Page 60, line 21, read "one and one-fourth miles 

 for two," etc. 



Page 118, MARGARITINA should follow U. 

 obliquus, page 120. 



M. deltoida, put a period after smooth and read 

 ANADONTA, not anadenta. 



J. solea concolor, 136, after Viola. Green violet, 

 leaves oblong, pointed both ends, entire, smooth; G.W. ; 

 1-2 feet. Long's Run, west of Marseilles. 



Corallorhiza multflora, 121, before spiranthes. 

 Coralroot; stem stout, purplish, leaves, a few brown 

 scales; flowers in a loose spike, pinkish, spotted with 

 purple, small, spurred. Woods west of Starved Rock. 



