Walker Prizes in Natural History. 
By the provisions of the will of the late Dr. William Johnson Walker two 
prizes are annually offered by the Bosron Socrery on NATURAL History for 
the best memoirs written in the English langasge on subjects propor by a 
committee appointed by tbe Council. 
-~ For the best memoir presented a prize of sixty dollars may be awarded; 
if, however, the memoir be one of marked merit, the amount may be increased 
to one hundred dollars, at the discretion of the committee. 
or the next best memoir, a prize not exceeding fifty dollars may be 
awarded. ` 
Prizes will not be awarded unless the memoirs presented are of adequate 
merit. ; 
The competition for these prizes is not restricted, but is open to all. 
. In all cases the memoirs are to be based on a considerable body of orig- 
inal and unpublished work, accompanied by a general review of the literature 
of the subject. 
2. Anything in the memoir which shall furnish proof of the identity of 
-the author shall be considered as debarring the essay from competition. 
3. Each memoir must be accompanied by a sealed envelope enclosing the 
author’s name and superscribed with a motto corresponding to one borne by the 
manuscript, and must be in the hands of the Secretary on or before April Ist 
of the year for which the prize is offered. 
Supa ECTS FOR 1896 :— 
(1) A study of an area of schistose or foliated rocks in thee eastern United 
States. 
(2) A study of the development of river valleys in some considerable area 
of folded or faulted Appalachian structure in Pennsylvania, Virginia, or Ten- 
< nessee. 
(3) An experimental study of the effects of close-fertilization in the case 
of some plant of short cycle. 
(4) Contributions to our know ledge of the general morphology or the gen- 
eral physiology of any animal, except man. 
Pacts FOR 1897 :— 
(1) A study of glacial, fluviatile, or lacustrine kennite associated with 
the closing stages of the glacial period. 
(2) Original inyestigations in regard to the chalazal impregnation, of any 
North American species of Angiosperme, 
(3) An experimental investigation in cytology. 
(4) A contribution to our knowledge of the morphology of the Bacteria. 
SAMUEL HENSHAW, 
. Secretary. 
Boston Society of Natural History, ? 
Boston, Mass., U. S. A. 
