202 ERYTHEA. 



macefe, Hydrocharitacese, by the late Thomas Morong; Vol. 

 XI., Parts 1 and 2, Cyperace^ by N. L. Britten and L. H. 

 Bailey. The following extract from the first circular letter 

 of the Board of Editors regarding this important undertaking 

 will, in view of the early publication of some of the parts, be 

 of interest, ** The general sequence of orders will be based 

 on that adopted by Professors Engler and Prantl in their 

 "Naturliche Pflanzenfamilien " now approaching completion, 

 and the work will be divided into seventeen volumes, and 

 issued in parts averaging about 100 pages each. About five 

 of these parts will constitute each volume. No illustration is 

 contemplated, but copious references to published plates and 

 figures will be made a feature. In addition to the technical 

 characterizations, chapters dealing with the economic, palse- 

 ontologic and horticultural aspects of each order will be 

 appended. Especial attention will be given to the verifica- 

 tion of original descriptions, to the examinations of type 

 specimens, to the citations of type localities and to geogra- 

 phical distribution. Each monographer will be responsible 

 for his own matter, the only restrictions placed on contrib- 

 utors being that they conform to a general style, and to 

 principles of nomenclature and citation, and that descrip- 

 tions be extended only to an average limit of a certain 

 Bumber of words. It is expected that an approximately 

 Uniform consideration of species can be secured." N. L. 

 Britton of Columbia College is the Chairman of the Board 

 of Editors. The other editors are George E. Atkinson, 

 Cornell University; Frederick V. Coville, U. S. Department 

 of Agriculture; Arthur Hollick, Columbia College; Edward 

 L. Greene, University of California; John M. Coulter, 

 University of Chicago; Byron D. Halsted, Eutger's College; 

 Lucien M. Underwood, De Pauw University. The co-opera- 

 tion of a large number of botanists has been secured and it 

 is hoped to complete the work within fifteen years. 



