The American Naturalist. 



ASSOCIATE EDITORS: 

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

 E. A. ANDREWS, V^.V>., Johns Hopkins University, Baltimore. 

 WILLIAM S. BAYLEY. Fk.D., Colby Universiiy, IVaUrviiSi. 

 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., US. National Museum, fVashington. 

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



CHARLES A. KOFOID, Ph.D., University of California, Berkeltf, 



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



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



D. p. PENHALLOW,D.Sa,F.R.M.S., 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., US Department of Agriculture, Washington. 



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 Museum of Natural Histor 



The American Naturalist is an illustrated monthly r„^„ 



of Natural History, and will 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 wUl 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 

 pomts of mterest, editorial comments on scientific questions of the 

 <^y, critical reviews of recent literature, and a quarterly record of 

 gifts, appointments, retirements, and deaths. 



All naturalists who have anj'thing interesting to say are invited 

 to send m 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 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 

 publishers. 



GINN & COMPANY, Publishers. 



