40 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
at an acute angle; third pair of veins usually free and excurrent to or above the sinus; 
succeeding veins free, closer, extending to the margin above the sinus; sori 4 to 9 
pairs, large, the basal ones 3 to 4 mm. distant from the midvein and 2 to 3 mm, from 
the costa, those above gradually approaching the midvein, the uppermost. basal upon 
the veinlets, the sori of each lobe or crenation thus borne in an elongate A-shaped line; 
indusium ample, irregularly repand-lobate, the lobes shallow and reflexed: recep- 
tacle relatively large, globose, squamulose-setiferous; leaf tissue membrano-herba- 
ceous, dark green and shining above, much paler below. 
Typx Locauity: District of Chinantla, Oaxaca, Mexico, altitude about 2,000 meters, 
DisrriBuTION: Known only from the original collection, Galeotti 6537. 
Fée’s original diagnosis is very incomplete and has afforded scant data for the 
above redescription, which is based almost wholly upon material of the type col- 
lection forwarded to the U, 8, National Museum from Brussels by Professor de Willde- 
man. This species is obviously related to H. guatemalensis, but appears to differ 
constantly in its deeper crenations and the very frequent junction of the first and 
second veinlets of each group at an acute angle below the sinus. 
EXPLANATION OF PLATE 24.—See p. 39. 
16. Hemitelia guatemalensis Maxon, sp. nov. ; Pate 24, a, 
Caudex and stipe wanting; lamina ample, presumably about 2 meters long, at least 
60 cm. broad, the apex very abruptly short-acuminate, the rachis stout, 6 to 8 mm, 
broad, firm, compressed, narrowly canaliculate ventrally, brownish, closely grayish 
squamulose-pubescent; pinnz alternate, spaced, divergent, faleate and decurved, 
ligulate-lanceolate, the larger ones about 32 cm. long, 3 to 3.5 em. broad, sessile 
or stoutly short-petiolate, slightly narrowed at the unequally rounded subcordate 
base, or obtusely cuneate at the upper side, irregularly and obliquely crenate nearly 
throughout, only the apical fourth serrate, gradually serrulate at the long-acuminate 
apex; crenations 2 mm. or rarely 3 mm. long, 6.to 8 (casually 10) mm. broad at the 
base, rounded, acutish distally, the margins entire, closely revolute, the sinuses 
acute or acutish; costae very stout, elevated upon both sides, below similar to the 
rachis, above (together with the veins, veinlets, and leaf tissue above) glabrous; main 
veins about 40 pairs, the venation (including areolation) otherwise similar to that of 
H, mexicana, except as to the number of veinlets (these 4 to 6 pairs to each group); 
sori 4 to 6 pairs, distinctly inframedial upon the véinlets; indusium light brown, irregu- 
larly semicircular, 2 or 3-lobate, the lobes pateriform; receptacle elongate-capitate, 
minutely squamulose-pubescent; leaf tissue rigidly membrano-herbaceous, light green 
and lucid above, very much paler below. 
Type in the U. 8. National Herbarium, no. 830363, collected in Guatemala by O. 
Salvin (without number), distributed from the Royal Gardens, Kew, as H. subincisa. 
Hemitelia guatemalensis is to be compared with H. mericana and H. lucida. Only 
the type specimens have been seen. 
EXPLANATION OF PLATE 24.—See p, 39. 
17. Hemitelia choricarpa Maxon, sp. nov. PLATE 24, d. 
Caudex and stipe wanting; lamina apparently about 1.5 meters long, 40 to 50 em. 
broad, pinnate, acuminate, the rachis very firm, rather slender, yellowish brown, 
sharply bicarinate-sulcate and glabrous above, the under surface loosely crispate- 
tomentulose, the persistent whitish or yellowish hairs short and somewhat spreading; 
pinne subopposite to nearly alternate, 5 to 6 cm. apart on each side, oblong-linear, ses- 
sile, the upper ones ascending, obtusely and subequally cuneate or at. the upper side 
slightly excavate; middle pinne divaricate or ascending, rounded-truncate or sub- 
cordate at the base, 27 to 32 cm. long, 3.5 to 4 cm. broad, pinnately lobed at the base 
about one-half the distance to the costa, above this (and nearly throughout) about two- 
fifths the distance to the costa, beyond this crenate, the acuminate-attenuate extremity 
obscurely serrulate; costee conspicuously elevated on both surfaces, glabrous above, 
