BULLETIN 



OF THE 



ILLINOIS STATE LABORATORY 

 Natural History. 



VOLUME II. 



EREATA. 



Page 5. Third line of table, second column, for 39, read 

 38; sixth line, second column, for 121, read 120. 



Page 9. Seventeenth line, for conjunction, read conjuc/a- 

 fion. 



Page 21. Thirteenth line, for Ricciacse, read Ricciacece. 



Page 67. Seventeenth line from bottom, for F. fraligi- 

 folia, read F.fragilifolia. 



or IK) iiifrciLLiif uii ijuh siiijjeut. 



4. Many of the species described as new by Ametican 

 writers are not represented in any American collection. 



When we add to the above the inherent complexity of the 

 group, we begin to see some of the difficulties in the way of 

 study. It is to relieve in part these difficulties, and to stimu- 

 late a more complete collection of Hepaticce, particularly in un- 

 explored portions of our country, that the present compilation 

 has been made. That it is at best an imperfect representation 

 of our hepatic flora is painfully apparent to its writer, but it is 

 ho])od that it may serve as a stimulus to more work \n this 



