1896.] l^nYmo^.— The Plants of Westmcath. 47 



S. vimlnalls x caprea {S. Smithiana, Willd.)— Roadside, Quarry Bog, 



near Mullingar. 

 Epipactis media, Fries. (VII.)— Knock Drin wood. 

 Orchis Incarnata, L. (VII.)— Bog of Lynn; vide remarks regarding 



this plant in the Cyb. Hib., p. 281. 

 Sparg^anlum ramosum, Huds., var. mlcrocarpum, Newm. (VII. 



—Quarry and Tullaghan Bogs. 

 Potamogcton rufescens, Schrad. -Drain from Iv. Drin. A new 



locality for this uncommon Westmeath plant. It is recorded from 



Iv. Ennel (Belvedere Lake) in the Cyb. Htb.—and was again found 



there this year ; also from near L. Ree by Messrs. Barrington and 



Vowell. 

 P. deciplens, Nolte. {=F. hicens x perfoliatus) (VIL) — L. Derevaragh. 

 P. Frlcsil, Rupr. (VIL)~In a dense mass in Lord Longford's boat 



harbour at L. Derevaragh ; also at L. Ennel. 

 Carex dlvulsa (Good.) (VII.) — Knock Ross. 

 C. Coodenovil, J. Gay., var. Juncella, T. M. Fries (VII.)— Bog of 



Lj'nn. 

 AgTostis canina, h., forma mutica, Doll. (VII.) — Drinmore. 

 Phragmitcs communis, Trin., var. nigricans, Gren. and Godr 



(VII.)~N.W. end of L. Owel. 

 Poa pratensis, 1,., forma subcoerulea, Sni. (VII.)— Bog of Lynn. 

 Glycerea plicata, Fr. (VII.) — In drains, Knock Drin. 

 Athyrium Filix-fcemina, Roth., var. convcxum, Newman (VII.) — 



Knock Drin. 

 Lastrea Filix-mas, Presl., var. afFinis, Bab. (VIL)— Knock Drin. 

 var. paleacea, Moore (VII.) — Knock Drin. 



Chara vulgaris, L-, var. longibracteata, Kuetz. (VIL)— L. Ennel. 



CORRESPONDENCE. 



The Shell of Helix nemoralis. 



Sir, — In the admirable issue of the Irish NaUiralist for September, 1895, 

 Mr. R. Standen describes (p. 270) the shells of the sub-fossil Helix 

 ne7noralis of Dog's Bay as being " not calcareous as in recent examples, 

 but more of the nature of aragonite." We have passed out of the days, 

 let us hope, when shells were commonly said to consist of " lime " ; but 

 the above statement is so surprising that it should not remain without 

 comment. What is aragonite if it is not calcareous } And how can a 

 substance be " more of the nature of" a well defined mineral species } 

 I presume that the shell of Helix nemoralis has been proved to consist of 

 calcite in fresh specimens. 



Grenvii.i,e: a. J. C01.E. 



