408 



THE AMERICAN NATURALIST [Vol. XLI 



Studies on the pollination of AVisconsin flowers are being published 

 l)y Gracnieher in current numbers of the BuUeiin of the Wimnisin 

 Natural Hhtory Society. 



Von Iherincr contributes an illustrated account of the myrmeco- 

 philous ( '(•(Topias to recent iniinbcrs of Engler's Botanische Jahrbucher. 



Disscniitiation by tlir aid of ants is the subject of a well illustrated 

 memoir ly S.-niaii. 1(m-, forniinc:' vol. 41, no. 7 of the K. Svenska Veten- 

 sknpsnk,ulrwir>,s IIa,nl/inr,ar. 



IVtcii, i^ p'ul.li-^l.r.l. uiili'illHMr.aions, in vol. 3, part 2 of the Anna'h 



A long list of plants known to contain i)nissic acid is separately 



Studies on tiie influence of spectral colors on the sporulation of 

 Saecharomyces are reported by Purvis and Warwick in vol. U, part 

 1 of the Proceedings of the Camhridcje Philosophical Society. 



The root-knees of Somieratia arc well figured in the Annual Report 

 of the Director of Forest ni uj I he Philippine Islands for the Period 

 July, lOOr, to June SO, imn;. 



A rope-like tumor of Hetulo pnpiilijniid is described and figured 

 by Penhallow in a separate from noI. 12 of the Transactions of the 

 lioyal Societi/ of Canada. 



