and Mrs. Hayden, have communicated more perfect specimens 
gathered at Filey, on the Yorkshire coast, in July 1850, which 
seem to connect the Orkney plant with an American species 
gathered at Newport, Rhode Island, to which I had previously 
given the name “rosea.” The Orkney plant, here figured and 
described, if not a distinct species, is still so much broader than 
either the American or the Yorkshire plants that it may be re- 
tained as a well-marked variety. Our figure is, however, so 
imperfectly characteristic of the species, that another will be 
desirable, which we trust to give before the close of the work, 
and, to afford time for discovery, both to our Orkney and York- 
shire friends, shall defer it to the latest practicable period. 
Mrs. Gatty’s largest specimen, most kindly placed at our 
disposal, so nearly resembles one of the American specimens 
that it might have been supposed to be from the same locality ; 
while Mrs. Hayden’s in its rather broader frond approaches the 
Orkney form. Mere dreadth of frond is an uncertain character : 
a better distinction between this species and C. clavellosa lies in 
the more elliptical and obtuse ramuli, which are greatly more 
constricted at the insertion. Another character is pomted out 
by Mrs. Gatty, whose specimen bears tetraspores,—namely, that 
these are collected into several distinct sorz, not dispersed through 
the branchlets, or forming one general sorus. 
Fig. 1. Plants of CurysyMENTA ROsEA, var. ORCADENSIS :—the natural size. 
2. A young frond :—slightly enlarged. 3. An older frond :—the same. 
4. Transverse section of the frond :—/ighly magnified. 
