211 263 
var. 6. Not unlike D. nicaraguensis but texture thinner and segments less fal- 
cate, acute; lower pinnz with a long cuneate, entire base as in D. tristis. Rachis 
and coste beneath very shortly pulverulent by stellate hairs. Sori subcostular, 
setose by many multibranched hairs. Probably a new species, but the specimens 
are too fragmentaric for a description. 
Honduras: San Pedro Sula, 1500', C. TurEME ed. J. D. S. nr. 5693 part. (C, W). 
In Brazil several forms occur, which most authors have referred to D. letragona, 
but which are positively specifically different; see D. scabra, D. incompleta and others. 
Nephrodium aureo-viridum Jenman, W. Ind. and Guiana Ferns 238. 1908 is, as far 
as I can judge from a photograph and a fragment of JENMAN's type-specimen (from 
British Guiana), received from Miss Srossow, not safely distinguishable from D. te- 
tragona. Its sori are said to be indusiate when young. 
V 963. Dryopteris megalodus (Schkuhr) Urban, Symb. Ant. 4: 21. 1903; 
C. Chr. Ind. 277. — Fig. 41a. 
Syn. Polypodium megalodus Schkuhr, Kr. Gew. 1: 24 tab. 19 b. 1806. 
Goniopteris quadrangularis Fée, 11 mém. 63 tab. 16 fig. 3. 1866. 
(For other synonyms see Ind. Fil.). 
ScukuHR characterized this species by pointing out the presence of stellate 
hairs on the underside; as the species here named D. megalodus differs from other 
species of Eugoniopteris, D. leucophlebia excepted, by that character, and as SCHKUHR’s 
plate very well illustrates our species, I have no doubt that I understand the spe- 
cies of ScukuHR rightly. As suggested in Index Fil. Polypodium pennatum Poir. 
Enc. 5: 535.1904 is probably the same species and, if so, PorrET’s name has priority. 
I have seen the original specimen of it in Herb. Lamarck (Mus, Paris) but unfor- 
tunately my notes do not permit me to identify it with D. megalodus with absolute 
certainty; it may be also D. nephrodioides. I prefer, therefore, to name the species 
by that name, under which it has been known for a century. 
D. megalodus is not closely allied to D. tetragona, with which Baker united 
it. It resembles that species mostly by its lower pair of veins anastomosing under 
a broad angle. From D.glandulosa, with which it has very often been confounded, 
it differs by its stellate hairs, venation and absence of aérophores. 
The short-creeping rhizome is sparsely clothed with castaneous, small scales, 
which are stellato-pubescent throughout. Stipe and rachis often quadrangular and 
slightly puberulous by very small and soon deciduous stellate hairs. Pinne few, 
seldom 10 to a side, distinctly stalked, 15—25 cm long, 3—4 broad, herbaceous, dark- 
green, incised about '/s to the costa into falcate, obtuse, faintly crenate, close lobes, 
glabrous above, costze and veins beneath minutely puberulous by stellate hairs, leaf- 
lissue of the underside with microscopic stellate hairs or glabrous. Venation some- 
what variable; veins 12—16 to a side, simple, the basal pair always anastomosing 
and sending a branch to a cartilagineous membrane, which extends from the sinus 
34* 
