STENOGRAMME. 123 



them {O. spinosa) is the Agar- A gar of the Chinese, and is 

 largely collected both for culinary purposes and as a compo- 

 nent part of some of the strongest Chinese glues. It has re- 

 cently been imported into England, and is occasionally 

 used instead of carrigeen, in making jellies and blancmanges. 

 Any other species which would boil down into jelly may 

 be used, as all are tasteless or nearly so, after having been 

 cooked. 



SYNOPSIS OF THE BRITISH GENERA. 



* Frond flat., expanded, leaf-like, dichotomous or palmate. 



I. Stenogramme. Conceptacles linear, rib-like. [Plate 



15, D.] 



II. Rhodymenia. Conceptacles hemispherical, scattered. 



[Plate 16, A.] 



** Frond coinpressed or terete, linear or filiform, much branched. 



III. Sph^rococcus, i^;•o/^(i? linear, compressed, two-edged, 

 distichously branched, with an obscure midrib. 

 [Plate 16, B.] 



IV. Gracilaria. Frond filiform, compressed or flat, irre- 

 gularly branched ; the central cells very large. [Plate 



16, C."] 



V. Hypnea. Frond filiform, irregularly branched, tra- 



versed by a fibro-cellular axis. [Plate 16, D.] 



I. Stenogramme. Harv. [Plate 15, D.] 



Frond rose-red, leaf-like, nerveless, laciniate, cellular ; the 

 central cells large, transparent, in several rows, those next 

 the surface minute, coloured, closely packed. Fructification: 

 1, linear, convex, longitudinal, (nerve-like) conceptacles^ 

 containing a dense mass of minute spores ; 2, tetraspores 

 (unknown). — Name, from (t-tevoj, narrow and ypafjifxy), a line; 

 alluding to the linear fructification. 



