82 FONTINALIS. 



rious structure of its inner peristome. We speak, however, only 

 of the two first of the following species ; for of the third we can 

 say nothing, having never seen the peristome. Its habit and 

 strongly-nerved leaves differ essentially from the two others. 



1. F. antipyretica; leaves nerveless, for the most part compli- 



cato-carinate. (TAB. XXII.) 



F. antipyretica. Linn. Sp. PL p. 1571. Turn. Muse. Hib. p. 19.9, 

 Engl. Bot. t. 859. Moug et Nestl. n. 238. Dill. Muse. t. 33. / 1. 



HAB. Rivers, alpine streamlets (where it is always small), 

 and stagnant waters; abundant on wood by river banks. 



Steins often a foot in length, fluitant. Leaves generally 

 broadly ovate and trifarious, acute, quite entire, not always 

 complicate- carinate; and we have sometimes seen them so 

 plane and so narrow, that it has been scarcely possible to 

 distinguish them from those of F. squamosa. Fruit lateral, 

 principally from the lower part of the stems. Perichsetium 

 large; its leaves resembling closely imbricated scales ; they 

 are of a roundish form, concave, nerveless, frequently erose 

 at their apices from the action of the water. Capsule ellip- 

 tic ; lid conico-acute. 



The specific name was given to this plant in allusion to 

 its being employed by the Swedes to fill up the spaces be- 

 tween the chimney and the walls, and thus, by excluding 

 the air, prevent the action of the fire. 



2. F. squamosa ; leaves nerveless, plane, or very slightly con- 



cave. (TAB.XXII.) 



F. squamosa. Linn. Sp.Pl. p. 1571. Hedw.St. Cr. v. 3. t. 12. Turn. 

 Muse. Hib. p. 199. Engl. Bot. t. 1861. 



HAB. In alpine rivulets of Wales and Scotland. Dille- 

 nius and Dickson. 



This appears to be an extremely rare plant; and perhaps 

 other people, as we ourselves have done, have mistaken 

 small varieties of the preceding species for it. Judging 

 from the breadth of the leaves of the English Botany figure, 

 we think that even that may be nothing more than F. a?i- 

 tipyretica ; and we know that all the specimens we have 

 received from Ireland under the name of F. squamosa have 

 been such. 



The only specimens we have seen of it, and those are 

 very much injured, are received from Mr. Dickson, and pre- 

 served in Mr. Turner's Herbarium. It is extremely slender 

 in its branches, and the leaves are lanceolate, yet so narrow 



