230 Mr. T. Moore on Glyceria fluitans and G. plicata. 



Theron tenuirostre. T. capite colloque castaneis, dorso humerisque 

 vinaceis, pectore ochraceo, uropygio ventreque canis, cauda supe- 

 riore parte tectricibusque viridibus inferiore atra apice cano tec- 

 tricibus inferioribus Isete castaneis et elongatis ad extremitatem 

 caudse, tibiis maculaque inter illos flavis remigibus scapularibusque 

 atris fiavo Isete marginatis ; rostro flavo, pedibus rubris. 

 Long. tot. 10 unc. ; tarsi | unc. ; ros. fron. 7 lin. 



Perdix Charltonii. P. dorso alisque superiore parte atris oleaceo- 

 brunneis irroratis et maculatis, vertice nuchaque brunneis; gula 

 fronte lineaque superciliari albis singulis pennarum atro apice ma- 

 culatis, collo capistro ferrugineo ornato pectore lateribusque atris, 

 fasciis ferrugineis, transversatis ventre maculaque post-oculari fer- 

 rugineis, tibiis albidis, rostro pedibusque flavis. 

 Long. tot. 12 unc. ; tarsi 1 J unc. ; ros. fron. j unc. 



Rallus superciliaris. R. oleaceo-brunneus gula alba striga superci- 

 liari rufo subtus strigis atris et albis transversis alternate notatis, 

 pedibus rostroque viridibus. 

 Long. tot. d^ unc. ; tarsi li unc. ; ros. fron. -^-q unc. 



XXV. — On the Glyceria fluitans and G. plicata. 

 By Thomas Moore, Esq. 



To the Editors of the Annals of Natural History. 



Gentlemen, 

 It may be interesting to some of yom* readers to know tliat the 

 Glyceria plicata of Fries has been determined to hold a place in 

 the British flora. 



The following are the circumstances upon which this state- 

 ment has been made. In the summer of 1844 I was much struck 

 by the great difference in appearance between the plants of Gly- 

 ceria (assumed to be G. fluitans) which surrounded one or two 

 pools of water in some meadows northwards of London. The 

 plants appeared to consist of two distinct forms, which grew in- 

 termixed, and were so different from each other as to be detected 

 on the slightest glance. One of these forms had the leaves about 

 half-folded, so as to appear channeled ; at the same time, they 

 were long and gradually tapering to a fine point, and conse- 

 quently had the appearance of being much narrower than those 

 of the other form, which had (comparatively) short, flat (and 

 therefore apparently broad) and obtusely-pointed leaves. On a 

 closer examination, that which may be termed the narrow-leaved 

 plant was found to have large, oblong outer palese, whilst in the 

 broad-leaved plant these were smaller and of an ovate form. I 

 generally noticed that in plants of equal vigour the spikelet was 



