NOTICE TO CONTRIBUTORS 
The Journal of Experimental Zoology, appearing eight times a year, will publish 
pjfpers which embody the results of original research of an experimental or analytical 
nature in the field of zoology, including investigations on growth and development, 
both normal and pathological, on reproduction, regeneration, cellular phenomena, 
evolution, variation, heredity and ecology, and upon topics in general physiology. 
Contributions must not be of unreasonable length in general, it is not desired to 
publish papers that will occupy more than fifty printed pages. Purelj-^ preliminary 
notices will not be published. 
No paper that has already appeared elsewhere will be accepted for publication- 
Simultaneous publication in another journal will not be agreed to. 
Manuscripts fehould be typewritten on one side of paper 8^ x 11 inches and should 
be packed flat, not rolled or folded. 
Footnotes and other subsidiary matter should be typewritten on one or more separate 
sheets. Footnotes should be numbered consecutively throughout the article. The 
location of other subsidiary matter should be indicated by notes, letters or other signs. 
Figures should be drawn for reproduction as line or half-tone cuts, so that they may 
be printed in the text, either singly or in groups, unless the author is prepared to defray the 
additional cost of a more expensive form of illustration. Half-tones are frequently 
printed separately to obtain the required details and inserted as plates. All colored 
plates, lithographs, heliotypes, photogravures, etc., are, of course, inserted, and cost 
extra. In grouping the drawings it should be borne in mind that, after the reduction 
h as been made, the figures are not to exceed the dimensions of the printed matter on 
the page, 4^ x 6^ inches. Single plates, inserted, may be 5 x 7^ inches, or less, and 
double plates (folded in the middle) 11| x 7^ inches. 
The lettering of the figures should be made with a view to a neat appearance when 
printed. Printed letters and numbers will be furnished without cost to authors for their 
illustrations. A list of letters and numbers should be given and the reduction to which 
they are to be subjected should be stated. 
Galley proofs will be sent to the author and all corrections are to be clearly marked 
thereon. Page proofs will be revised by the editors. Manuscripts and drawings 
should in every case be submitted in complete and finished form. • 
The Wistar Institute reserves the privilege of returning to the author for revision 
approved manuscript and illustrations which are not in proper finished form for the 
printer; or if the author so desires, the Wistar Institute will prepare the manuscript 
and drawings and charge the author for the cost of this work. 
A Style Brief giving all the details of typographic arrangement and methods to be 
followed in the preparation of manuscripts and drawings for publication in any of the 
five journals published by the Wistar Institute, will be sent free to authors upon appli- 
cation to the Wistar Institute in Philadel])hia. 
The Journal will furnish to authors 50 reprints of their contributions gratis. Addi- 
tional copies may be obtained according to rates accompanying galley proof. The order 
for reprints should be sent with the galley proof, for which purpose blank forms are 
supplied. 
Manuscripts and drawings should be sent by express or registered mail to the Manag- 
ing Editor, Ros,'^ G. Harrison, 2 Hillhouse Avenue, New Haven, Conn. 
