Igrt] SHREV E—J AMAICAN HYMENOPHYLLACEAE 185 
above 1220m. The number of species (of the 31) to be expected 
at the different altitudes is as follows: 
305 m, 610 | OIs | 1220 | 1525 | 1830 | 2135 
it is in the unbroken forests of the windward slope of the Blue 
Mountains, at about 1525 m. altitude, that the Hymenophyllaceae 
are richest in species, and it is there too that they are most numer- 
ous in individuals, forming a far more conspicuous element of the 
vegetation than at higher or lower elevations. The most abundant 
and characteristic species at 1525 m. are: 
Hymenophyllum fucoides Sw.? Hymenophyllum catherinae Hook. 
Hymenophyllum asplenioides Sw. Trichomanes crispum L. 
Hymenophyllum ciliatum Sw.  _—_—‘Trichomanes rigidum Sw. 
Hymenophyllum polyanthos Sw. Trichomanes crinitum Sw. 
Hymenophyllum lanatum Fee Trichomanes radicans Sw. 
Hymenophyllum axillare Sw. Trichomanes pyxidiferum L. 
Hymenophyllum lineare Sw. Trichomanes capillaceum L. (7. 
Hymenophyllum sericeum Sw. trichoideum Sw.) 
In virgin forest along the banks of the Mabess River, at about 
1100 m. altitude on the windward side of the island, the writer 
has seen rich growths of Hymenophyllaceae, which were made up, 
however, solely of Trichomanes Hookeri Presl. (I. muscoides Sw.) 
and T. pyxidiferum L. Near the summit of Mount Diablo, at 
600 to 700 m. altitude in the central limestone district of Jamaica, 
the Hymenophyllaceae are relatively rare, and must be sought 
carefully to be found at all. The only species observed there by 
the writer were: 
Hymenophyllum hirtellum Sw. Trichomanes crispum L. 
Tric omanes Hookeri Presl. Trichomanes arbuscula Desv. (7. 
tichomanes sphenoides Kze. Bancroftii Hook. & Grev.) 
: The nomenclature used is that of CaristeNsen’s Index Filicum. The writer’s 
Collection of Hymenophyllaceae was determined by the late Dr. i ie Car 
of Columbia University. 
