MR. C. B. CLARKE ON THE FERNS OF NORTHERN INDIA. 427 
4 Equisetums, which I have added to make the paper include all the Acrogens having 
spores of one kind only. By far the largest genera in North India are Polypodium 
(67 species), Asplenium (56 species), Nephrodium (54 species). 
The new species described are 16, viz. :— 
Hymenophyllum Levingii. Nephrodium ingens, W. S. Atkinson (compound Lastrea). 
Cheilanthes albomarginata. Nephrodium Wightii, - iis 
Pteris subindivisa. Nephrodium de P stt 
Asplenium bellum, Allantodioid. Polypodium subtripinnatum (Phegopteris) . 
Asplenium torrentium, Polypodium chattagramicum (Dictyopteris) . 
Asplenium sikkimense, reng Polypodium subameenum (Goniophlebium). 
Asplenium succulentum, : Polypodium jaintense (Niphobolus). 
Nephrodium rhodolepis (compound Lastrea). Polypodium clathratum (Pleopeltis). 
A considerable number of species (especially of Wallich’s) that have been sunk or 
misunderstood are rehabilitated. More interesting than these or the new species are 
several cases where, by aid of the more abundant material at my command, I have 
altered the genus (or subgenus) to which the plant is referred: such are :— 
Hemitelia Brunoniana, formerly Alsophila Brunoniana, Wall. 
Diacalpe feniculacea, Si Aspidium feniculaceum, Hook. 
Davallia dareeformis, m Polypodium dareæforme, Hook. 
Lindsaya repens, St Davallia repens, Baker. 
A. (Euasplenium) longifolium, y A. (Diplasium) longifolium, Baker. 
A. (Pseudallantodia) procerum, ` ,, A. (Athyrium) umbrosum, var., Baker. 
N. (Lastrea) sikkimense, » Aspidium sikkimense, Baker. 
P. (Pleopeltis) erythrocarpum, ` P. (Goniophlebium) erythrocarpum, Baker. 
Several of these species, placed in wrong genera or subgenera, have been hitherto 
insoluble mysteries to many Indian botanists who had collected the plants, but looked for ` 
them in the book under other genera or subgenera. 
I have appended to the paper a complete reduction of the North-Indian Ferns in 
Wallich’s Herbarium. This will be of some value to this Society in showing the state 
of that Herbarium, and may also assist botanists to form a correct estimate of the 
weight to be attached to the quotations of the Wallichian numbers. In very many 
cases a mixture of ferns is pasted down under one number; and in numerous cases the 
same fern appears under different numbers. The rule as to quoting Wallich’s names is 
that the name applies to the plant on the large paper type-sheet (letter A). But this 
rule cannot be implicitly followed: the Wallichian no. 361 contained a large number of 
duplicate sheets; all these were one fern, Aspidiwm fuscipes, to which the specific name 
_ fuscipes has been applied; but I find that the type-sheet no. 361 is Nephrodiwm sage- 
nioides, Baker, belonging to a different subgenus. About 3 per cent. of the Wallichian 
Ferns are blank sheets, on which are pasted the Wallichian lithographed ticket. I learn 
from Mr. West that these Ferns arrived loose, and that when they came to be pasted 
down it was in many cases found impossible to discover the plant belonging to the 
ticket ; this seems to have been specially the case with the rarer and more critical species, 
of which probably only a small quantity was collected. The result of all these compli- 
cations is that I begin to doubt whether the great pains taken in quoting Wallich’s 
numbers are well bestowed ; for I find, in very many instances, that such quotations have 
merely puzzled or misled. Mr. Moore has already pointed out that the Aspleniùm Fin- 
