828 THE AMERICAN NATURALIST.  [Vou. XXXVI. 
An editorial in the same number of Biometrika contains some 
desirable cautions as to the polymorphism of certain species which 
appears to result from the frequency polygons derived from tabulated 
individual measurements. 
The first fascicle of Vol. III of the Contribuzioni alla biologia 
vegetale of the R. Lstituto botanico di Palermo contains the following 
papers of general interest: Terracciano, “ Contributo alla biologia 
della propagazione agamica nelle fanerogame "; Albo, “ Sul signifi- 
cato fisiologico della nicotina nelle piante di tabacco”; La Floresta, 
* Formazione di radici avventizie nelle foglie di Gasteria acinact- 
folia"; Borzí, * Anatomia dell apparato senso-motore dei cirri delle 
Cucurbitacee " ; and La Floresta, ** Struttura ed accrescimento secon- 
dario del fusto di Xanthorrhoea." The articles are well illustrated 
and a French résumé is given of their contents. 
Rhodora for June contains the following articles : Collins, ** Marine 
Cladophoras of New England"; Nye, H. A., * Blooming of Hepat- 
; Brainerd, “Two more Rare Plants from Lake St. John, 
Quebec" ; Blanchard, “ Some Vermont and New Hampshire Plants 
in the Middle Connecticut Valley," I; Fernald, “The Seneca 
Snakeroot in Maine" ; Webster, * C/athrus columnatus in Lawrence, 
Mass."; Robinson, *Two New Hypericums of the Adpressum 
Group”; and Fernald, ** An Anomalous Skullcap.” 
The third Report of the Michigan Academy of Science contains 
the following botanical articles : Pollock, * Relation of the Fibro-Vas- 
cular Bundles in the Root and Hypocotyl in Æchinocystis lobata”’; 
Reed, “Ecology of a Glacial Lake”; Larsen, “Disease of the 
White Birch”; Denton, “Interfoliar Scales of Monocotyledonous 
Aquatics"; Clark, “ Notes on the Flora of Eaton County” ; Davis, 
“Notes on Utricularia cornuta” ; Davis, * Wolffia Notes” ; Long- 
year, “Notes on Michigan Saprophytic Fungi"; Longyear, “ New 
Species of Michigan Fungi"; Longyear, *Sclerotium Disease of 
the Huckleberry”; and Conover, “ Asparagus plumosus.” 
The Botanical Gazette for May contains the following articles : 
Miyaké, “On the Starch of Evergreen Leaves and its Relation to 
Photosynthesis during the Winter”; Newcombe, * Rheotropism of 
Roots” (conclusion) ; Overton, * Parthenogenesis in Thalictrum pur- 
purascens” Leavitt, “Subterranean Plants of Epiphegus” ; Fair- 
child, * Notes of Travel,” VIII; Cockerell, “A New Heliotropium 
(CR. xerophilum)." ‘5 
