(Continued from page 3 of Cover. ) 
‘ , VOLUME 42. 
1. Rosinson, B. L.—Studies in the Eupatorieae: (I.) Revision of the Genus Piqueria; (II.) 
. Revision of the Genus Ophryosporus ; (III.) The Genus Helogyne and its Synonyms ; (IV.) 
ses and Synonymy of Hupatorieae and of Certain Other Compositae which have been 
Classed with them. pp. 1-48. May, 1906. 50c. 
