I 



Discoreyy of L'niffuhi (oul Paradoxides — Winchell. lOlJ 



the (lulf of I'liilaiid and described ifc as Ricuha-ia Flos-aqua'. 

 He subsequently stated it to be the same as Cohn's plant. Dr. 

 Gobi has also examined the Minnesota plant from specimens for- 

 warded by Dr. Farlow, ^ and pronounces it to be the same as his 

 R. Flo^-'vinu'. Thes^, together with a single gathering in Sweden, 

 comprise all the stations for the floating form at present known 

 to tlie writer. 



A phenomenon so conspicuous, and. to the popular mind so 

 mysterious, is deserving of careful study. Although the plants 

 are probably not poisonous, a knowledge of their habits and mode 

 of development may yet be of considerable value from a sanitary 

 point of view. 



June 2, 18S5. 



\ Paper P. ^ 



XOTK'E OF THE l)rSC«>VERY i)Y L[N(}UL.\ ANT) PARADOXIDKS TN TRK 

 RED QUAUTZrXES OF MIN^VESOTA. — BlJ N. H. WhicJielL 



On the occasion of a late visit to Pipestone, in the southwest- 

 ern corner of Minnesota, my attention was attracted by the aspect 

 of a number of slabs of catlinite, or pipestone, taken from the 

 quarry which has long been wrought by the Aborigines for the 

 material of their calumets or peace-pipes. These slabs lay in a 

 pile of this material gathered by Mr. C. H. Bennett, and had evi- 

 dently been exposed to the weather for two or three yearn. They 

 are nearly covered on one side by the impressions of small shells 

 resembling Dlscina but which, on more careful examination, seem 

 more likely to be a species of Lhigula. The shell itself is wholly 

 wanting, only the casts remain. On some smaller pieces there re- 

 mains apparently a trace of the shell in the form of a white in- 

 crustation. This incrustation is quite conspicuous b}^ reason of 

 its contrast of color with the blood-red color of the slabs themselves, 

 and it might at first be supposed to be the same, or analogous to 

 the light spots which may often be seen in specimens of the catlin- 

 ite, producing a kind of s[) )ttedness which has given the stone 

 the appellation of "porphyry," by Messrs. Squier and Davis, in 



i; Bot. Gaz., viir, page 224. 



