ON ADIANTUM CAPILLUS-JUNONIS. 261 
known even by name to the majority of pteridologists, and was un- 
noticed in Sir W. Hooker's ■ Species Filicum.' 
In October, 1861, I gathered on the walls of the city of Canton, 
growing in the interstices of the bricks, an exceedingly pretty little 
Adiantum, which I at once decided to be new, and described in the 
Paris ' Annates des Sciences Naturelles' (4th ser. xv. 229), under the 
name of A. Cantoniense. The late Sir W. Hooker, in acknowledging 
specimens 1 had sent him, observed of this (in a letter dated 2nd 
January, 1862) : — " I may say certainly that it is new. I have com- 
pared it with all in my herbarium which have any sort of similarity 
with it. It is brother to A. lunulatum, as you observe, but abundantly 
distinct/ 5 
In the summer of 1866, my friend Dr. S. W. Williams, Secretary 
to the United States Legation at Peking, collected in dry places on 
the hills lying to the west of that capital, very beautiful specimens of 
a Pern quite identical with the Canton one ; and this circumstance 
causing me to inquire what species had been recorded from Peking, led 
to the conclusion that A, Cantoniense is a mere synonym of A. Capillus- 
Junonis. The Peking specimens have the rachis very frequently not pro- 
longed beyond the pinna?, but this is also often the case in the southern 
plant, and the comparison of numerous individuals from various loca- 
lities in the province of Kwangtung leaves no doubt whatever of their 
identity. 
Adiantam Guilehii, n. sp. ; ccespitosum, semipedale, praeter partem 
inferiorem stipitum tenuium ebeneorum parce paleaceam undique gla- 
hcrrimum, frondibus lineari-lanceolatis apice nee nudis neque radicanti- 
tofc, pinnis alternis brevissime petiolatis 3-5 lineas longis tenuiter 
merabranaceis subtus guttulis tlavidis glandulosis parce conspersis sub- 
Prominulo-venosis dimidiato-oblongis obtusis basi superiore truncata 
r achi parallela sterilibus magis conspicue et oblongo-fertilibus obscure 
et truncato-lobatis, lobo rachi proximo disoro, reliquis monosoris, soris 
°klongis approximatis. 
In umbrosis agri Pekinensis, r 
anssime 
l 
This neat and rare little Fern, of which 1 have only seen a solitary 
pecuncn 
to A. FJyeworthii, Hook. The best idea of it I can give is that it 
looks much like A. pedatum dwarfed, simply pinnate, and with the 
