Bulletin' of the Museum of Comparative Zoology 



AT HARVARD COLLEGE. 



Vol. LX. No. 1. 



NEW AND OLD SILURIAN TRILOBITES FROM SOUTH- 

 EASTERN WISCONSIN, WITH NOTES ON THE 

 GENERA OF THE ILLAENIDAE. 



By Percy E. Raymond. 



With Four Plates. 



CAMBRIDGE, MASS., U. S. A.: 



PRINTED FOR THE MUSEUM. 



January, 1916. 



