Vol. I] STEWART— BOTANY OF THE GALAPAGOS ISLANDS ' 107 



soil to 1000 feet. (no. 2084). Charles Isl. : common in open 

 places among rocks near the shore (no. 2085); Cuevas Bay, 

 Baur; Chatham Isl. : north side, Andersson; Wreck Bay, 

 rare on sand beaches (no. 2086). Duncan Isl.: Snodgrass 

 and Heller. Gardner Isl. (near Hood Isl.) : Snodgrass 

 and Heller. Hood Isl. : Snodgrass and Heller. Indefatiga- 

 ble Isl. : Academy Bay, common in lava crevices near sea 

 level (no. 2087) ; north side, Snodgrass and Heller. James 

 Isl.: Andersson; James Bay, Snodgrass and Heller. Tower 

 Isl. : Snodgrass and Heller. Further distr. U. S., Mex., W. 

 Ind., S. Am. 



Sclerothrix Presl 



S. fasciculata Presl, Symb. Bot. II. 3, t. 53 (1858); Rob. 

 (1), 178. — Albemarle Isl.: Iguana Cove, (no. 2089); 

 Tagus Cove, abundant at 4000 ft. (no. 2088). James Isl.: 

 James Bay, Snodgrass and Heller. Narborough Isl. : south 

 side, Snodgrass and Heller. Further distr. Mex., S. Am. 



CACTACEAE 

 Cereus Mill. 



C. galapagensis Weber, Bull, du Mus. d'Hist. Nat. Paris 

 1899, 312 (1899) ; Rob. (1), 179. C. Thouarsii Weber, 1. c. 

 312; Rob. (1), 180. — Charles Isl.: common in the vicinity 

 of the shore (no. 2090). Chatham Isl. : Basso Point, occa- 

 sional specimens were seen up to 800 ft. ; Sappho Cove, grows 

 very abundantly on the recent lava beds between the cove and 

 Finger Point, as well as on the older lava on the east side of the 

 cove, where it occurs abundantly in forests of Bursera graveo- 

 lens. This species reaches its largest size at this place, often 

 attaining a height of 25 or more feet. The articulations are 

 unusually thick here, sometimes being as much as 10-12 inches 

 in diameter ; Wreck Bay, common on the rocky coast and on the 

 sides and tops of exposed lava hills (no. 2091). Indefatiga- 

 ble Isl. : Academy Bay, no specimens of this species were 

 secured, but a photograph taken here shows a specimen very 

 similar to this species in general appearance. Its presence, 

 however, is doubtful. Endemic. 



Weber, 1. c, described two species of Cereus from Charles 

 Isl., viz., C. galapagensis and C. Thouarsii, but gave no charac- 



