Vor. I] STEWART—BOTANY OF THE GALAPAGOS ISLANDS py 
Histiopteris Agardh. 
H. incisa (Thbg.) J. Sm. Hist. Fil. 295 (1875). Pteris 
incisa Thbg. Fl. Cap. 733 (1823); Rob. (1), 114.—ABING- 
pon Isu.: occasional around 1950 ft. (no. 997). ALBEMARLE 
Ist.: Villamil, common in the upper moist regions (nos. 
998, 1000). James Ist.: James Bay, abundant in the moist 
regions (no. 999). Further distr. general in tropical regions. 
Hymenophyllum Sm. 
H. hirsutum (L.) Sw. Schrad. Jour. 1800, 2, 99 (1801). 
Trichomanes hirsutum L. Sp. Pl. 1098 (1753).—CHATHAM 
IsL.: Wreck Bay, abundant in moist shady places around 
1750 ft. (no. 898). Further distr. Mex., W. Ind., Brazil, 
Mascarine Ids. 
H. polyanthos Sw. Schrad. Jour. 1800, 2, 102 (1801).— 
Duncan Ist.: in dense tufts on the southeast sides of rocks 
at 1300 ft. (no. 899). Widely distr. in tropical regions. 
Hypolepis Bernh. 
H. repens (L.) Presl, Tent. Pterid. 162 (1836). Lon- 
chitis repens L. Sp. Pl. 1078 (1753). H. repens. Presly thes 
Rob. (1), 109.—Gatapacos Ips.: Capt. Wood. Further 
distr. Mex., W. Ind., S. Am. 
Nephrolepis Schott 
N. biserrata (Sw.) Schott, Gen. Fil. ad t. 3 (1834). As- 
pidium biserratum Sw. Schrad. Jour. 1800, 2, 32 (1801). N. 
acuta Presl, Tent. Pterid. 79 (1836); Rob. (1), 110.—AsB- 
incpon Isu.: forming heavy brakes above 1650 ft. (nos. 916- 
917). ApeMarRLE Ist.: Villamil, abundant in the vicinity 
of the shore, forming brakes 6 or more ft. in height. The 
area in which this fern occurs at this place is very limited and 
its presence here is due to several seepages of comparatively 
fresh water coming down from the upper parts of the island 
through crevices in the lava. This is one of the very few 
places on the islands where ferns occur at sea level, (no. 921). 
