(74) 



and anastomosing ; articulations cylindrical, becoming vertical and dicho- 

 tomous towards the sm-face, where the cells are minute and moniliform. 

 Substance cartilagino-membranaceous, very imperfectly adhering to paper. 

 Colour, a rather dull brownish red, changing to yellowish green in 

 decay. Favellidia formed immediately under the stratum of moniliform 

 cells that compose the periphery, containing numerous minute ovate 

 spores, and communicating with the surface by a minute pore. Tetra- 

 spores elliptical, cruciate, immersed among the moniliform filaments of 

 the perij^heiy, and grouped together in imperfect sori in the smaller 

 leaflets of the frond. 



This curious little plant has only been found with us in the south 

 of England, but it is by no means common, having there apparently 

 reached its northern limit of distribution, and in its slender form and 

 scanty abundance evincing its citizenship as that of a more southern 

 and more genial clime. 



With us it seldom attains the height of three inches, whilst specimens 

 from the south of France are six inches in length, and regularly bipin- 

 nated, and we are informed in Phyc. Brit, that in more southern lati- 

 tudes they are even still more luxuriant. We have received specimens 

 from Jersey, one in particular (which has passed through Dr. Harvey's 

 hands, and on which he has wi'itten "a superb specimen") gathered by 

 our indefatigable friend Mr. Girdlestone, that is quite seven inches in 

 height, and formed very much like a handsome Spruce Fu* ; others are 

 from three to five inches. Our figui'e is from one of the said specimens. 



Although by no means sportive in its habit, it very closely resembles 

 in its less regularly pinnated forms some of the more straggling varieties 

 of Gelidmm corneum, but from these it can be readily distinguished by 

 its more flaccid substance, and the difference of structure under the 

 microscope will be apparent at the first glance. The fruit of the two 

 species could scarcely be more diff"erent. 



EXPLANATION OF PLATE XCIV. 



Fig. 1. — Grateloujna Jilkina, natural size. 

 2. —Pinna with tetraspores in leaflets. 

 3. — Tetraspores from same. 

 4. — Pinna with tubercles. 

 6. — Transverse section of same. All magnified. 



