2324 OBSERVATIONS ON THE 
tifidis, basi plerumque pinnatis, laciniis (aut. pinnulis secundariis) line- 
ari-oblongis acutis aut acuminatis, ad pinnarum apices oblongis acutis 
aut obtusiusculis, margine subreflexo obsolete crenulato, ad costam 
costulasque subtus squamulis bullatis fimbriatis minutis caducis aul 
tenuibus elongatis setulosis plus minus persistentibus obsitis, dein sæpe 
nudis; soris venis plerumque 2-3-furcatis, ad apicem laciniarum sim- 
pliciter furcatis ad alas insertis, in lacinia quaque 2-serratis, easque su- 
pra medium aut basi solummodo rarius ad apicem usque obtegentibus ; 
involuero tenuissimo arachnoideo, mox evanido lacerato ; receptaculo 
globoso piloso.— Var. a, robusta, Hsskl., is the form which abounds in 
the lower situations, from 3000 to 4500 feet; the stem arrives only 
to a height of 15-20 feet, but is on the top nearly a foot thick; the 
fronds are 9-94 feet long, and in the midst 5 feet broad; the scales 
are few, small, and deciduous.—Var. B, squamulata, H., growing at 
the height of 8000 feet, the stem 45 feet high, on the top only 53 
inches thick ; the lacinize (I found this one only sterile !) subintegerrime 
obtuse rarius acutiusculee, costis eostulisque utrinque preprimis autem 
subtus dense paleaceis ; the scales are somewhat larger than that of a. 
—Var. y, densa, Msskl.; the stem is 40 feet high; the Jaciniæ are 
oblongs, sublineari-oblonge, faleatze acutiuscule aut obtuse, steriles 
paulo latiores, costule utrinque glabre, squamulis bullatis raris ; soris 
densis confluentibus, fere totas lacinias obtegentibus. ‘This one grows 
at a height of 4500-5000 feet.—Var. 8, mikrolobos, Hsskl. ; pinnis 
pinnulisque raris distantibus elongatis, laciniis parvis subintegerrimis 
acutis, antecedentis fere dimidio brevioribus. The stem is 40 feet 
. high, the fronds very small, and few. This I found near the warm 
. cataracts of the Gedeh; perhaps only a very old state of one of the 
former varieties.— Var. e, setulosa, Hsskl.; lacinim elongate pinnis 
raris parvis (23 feet long, not quite 1 foot broad), costis costulisque 
subtus paleis setulosis sat longis albidis patentibus preprimis in parti- 
_ bus Sterilibus obsess ; the trunk high, and the stipites are almost 
> verticillate, eight growing together at the same height. In consequence 
E of the copious medullary substance, principally in the larger, or rather 
Mer dene like the a, I had called it formerly 4. myelopoios, but I 
un it better not to separate it from the 4. contaminans, Wall. I 
ue another Alsophila, which I cannot separate from the caudata, Sm., 
but you call that species inermis, while my one has the stipes muricated ; 
perhaps your specimens are only pinnæ or the top of fronds, where the 
