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, WatervilU 

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

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

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

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

 D. S. JORDAN, LL.D., Stanf(yrd University 



CHARLES A. KOFOID, Ph.D., University 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 

 ISRAEL C. RUSSELL, LL.D., University of Michigan, Ann Arbor 

 ERWIN F. SMITH, S.D., U. S. Department of Agriculture, Washington 

 LEONHARD STEJNEGER, LL.D., Smithscmian Institutvn, Washington 

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

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

 WILLIAM M. WHEELER, Ph.D., Am-erican Museum of Natural History, 

 New York 



The American Naturalist is an illustrated monthly magazine 

 of Natural History, and mil aim to present to its readers the leading 

 facts and discoveries in Anthropology, General Biology, Zoology, 

 Botany, Paleontology, Geology and Physical Geography, and Miner- 

 alogy and Petrography. The contents each month will consist of 

 leading original articles containing accounts and discussions of new 

 discoveries, reports of scientific expeditions, biographical notices of 

 distinguished naturalists, or critical summaries of progress in some 

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

 points of interest, editorial comments on scientific questions of the 

 day, critical reviews of recent literature, and a quarterly record of 

 gifts, appointments, retirements, and deaths. 



All naturalists who have anything interesting to say are invited 

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

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

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

 to the general scientific reader. 



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

 sent to The American Naturalist, Cambridge, Mass. 



All business communications should be sent direct to the pub- 

 Annual Bubscilptlon, $4.00, net, in advance. Single copies. 35 centi 

 Foreign BUbscription, $4.60 



GINN & COMPANY, Publishers 



