The American Naturalist 



ASSOCIATE EDITORS 

 J. A. ALLEN, Ph.D., American Museum of Natural History, New York 

 E. A. ANDREWS, Ph.D., Johns Hopkins University, Baltimore 

 WILLIAM S. BAYLEY, Ph.D., Colby University, WatervUle 

 DOUGLAS H. CAMPBELL, Ph.D., Stanford University 

 J. H. COMSTOCK. S.B., Cornell University, Ithaca. 

 WILLIAM M. DAVIS, M.E., Harvard University, Cambridge 

 ALES HRDLICKA, M.D., U. S. National Museum, Washington 

 D. S. JORDAN, LL.D., Stanford University 



CHARLES A. KOFOID, Ph.D., Univer^ty of California, Berkeley 

 J. G. NEEDHAM, Ph.D., Lake Forest University 

 ARNOLD E. ORTMANN, Ph.D., Carnegie Museum, Pittsburg 

 D. P. PENHALLOW, D.Sc, F.R.S.C, McGill University, Montreal 

 H. M. RICHARDS, S.D., Columbia University, New York 

 W. E. RITTER, Ph.D., University of California, Berkeley 

 ERW^N F. SMITH, S.D., U. S. Department of Agriculture, Washin^on 

 LEONHARD STEJNEGER, LL.D., Smithsonian Institution, Washington 

 W. TRELEASE, S.D., Missouri Botanical Garden, St. Louis 

 HENRY B. WARD, Ph.D., University of Nebraska, Lincoln 

 WILLIAM M. WHEELER, Ph.D., American Muscurn of Natural History, 

 New York 



The American Naturalist is an illustrated monthly magazine 

 of Natural Tlistorv, and will aim to present to its readers the leading 

 facts and discoveries in Anthropolorry, General Biology, Zoology, 

 Br.Tany, Pi(lc<)ntologv, Geology and Physical Geography, and Miner- 

 al.>-y ;,n.i i;.-trography. The contents each month will consist of 

 k\i(!iii<: original articles containing accounts and discussions of new 

 (iisco.ciii s. n i)orts of scientific expeditions, biographical notices of 

 distii;i!ui-!i( (l naturalists, or critical summaries of progress in some 

 line; and in addition to these there will be briefer articles on various 

 points of' inti^rest, editorial comments on scientific questions of the 

 day, critua! reviews of recent literature, and a quarterly record of 

 gifts, ap[K)intments, retirements, and deaths. 



All naturalists who have anything interesting to say are invited 

 to send in their contributions, but the editors will endeavor to select 

 for publication only that which is of truly scientific value and at the 

 same time written so as to be intelUgible, instructive, and interesting 

 to the general scientific reader. 



All manuscripts, books for review, exchanges, etc., should be 

 sent to The American Natur.u.ist, Cambridge, Mass. 



Ail business communications should be sent direct to the pub- 

 lishers. 



GINN & COMPANY, Publi 



