ISO PROCEEDINGS OF THE AMERICAN ACADEMY. 



obtusis 1 cm. altis ope sulcorum acutorum separatis; areolis orbicularibus 

 3.5 mm. diametro tomeiito brevi tectis ; spiuis 20-25 in ladiales et cen- 

 trales non distributis rectis putigentibus maximo 4.5 cm. longo ; floribus 

 circa 10-11 cm. longis ; ovario tereti squamato ; squamis sparsis 1-1.5 

 mm. longis ovatis acutis ; perigonii tubo gracili paucis bracteolis brevibus 

 oriiato ; lobis exterioribus subspathulatis 3 cm. loiigis apice eroso- 

 denticulatis, interioribus brevioribus angustioribus acuminatisque ; 

 stamiuibus prope faucem perigonii affixis 2 cm. longis ; stilo florem 

 fere aequaute ; stigmatibus 11 fere 2 cm. longis filiformibus ; fructu 

 duro strato exteriori perfirmo ovoideo acute flore marcido coronato 7 cm. 

 longo 3 cm. diametro ; seminibus baud numerosis (ovulis plurimis 

 abortivis) disciforraibus 1 mm. diametro nigris lucidis leviter foveolatis." — 

 Albemarle Isl.: Pt. Christopber, Snodgrass & Heller, uos. 933 

 (hb. Berl. & hb. Gr.), 934 (bb. Berl. & hb. Gr.) ; Black Bight, Snod- 

 grass & Heller, no. 935 (hb. Berl. & hb. Gr.). " Note. — There is onfy 

 one species in the Galapagos Islands which may be compared with this, 

 namely C. galapagensis, Weber. The characterization of the latter is, 

 however, so imperfect that I cannot identify my species with it." [K. Sch. 

 in litt.]. Pandemic. In his field notes Mr. Heller reports a giant 

 Cereus on Bindloe (where rare), Chatham, James, and Narborough 

 Islands which was probably C. sderocarpus. It grew upon barren lava. 

 C. Thouarsii, Weber, Bull. du. Mus. d'hist. nat. Paris, 1899, p. 312 

 (1899). — Charles Isl.: Du Petit- Thouars. Endemic. Not satis- 

 factorily described. 



Opuntia, Raf. 



O. GALAPAGEiA, Hensl. Mag. Zool. & Bot. i. 467, t. 14, f. 2 (1837) ; 

 Hook. f. (3), 223; Anderss. (1), 224, & (2), 95; Hemsl. Gard. Chrou. 

 ser. 3, xxiv. (1898), p. 265, f. 75 ; Lindberg, Monatschr. Kakteenk. iv. 

 120-122, 134-135, & v. 10; K. Schumann, ibid. ix. 19, 20, x. 173, & 

 Gesammtbeschr. Kakteen, 747. — Charles Isl.: Hassler JiJxp., ace. to 

 ms. note of Engelm. (hb. Mo. Bot. Gard.). James Isl.: Darwin; 

 Hassler Exp., ace. to ms. note of Engelm. (hb. Mo. Bot. Gard.). Jervis 

 Isl. : Hassler Exp., ace. to ms. note of Engelm. (hb. Mo. Bot. Gard.). 

 Endemic. 

 X O. Helleri, K. Sch. nov. sp. in litt., " humilis plus minusve prostrata 

 30-60 cm. alta dense caespitosa ramosa ; articulis lineari-oblongis apice 

 basique acutis planis 11 cm. longis 4 cm. latis tenuibus apice setis fuscis 

 muuitis; areolis orbicularibus 2 mm. diametro non manifeste in tuber- 

 culis editis capillis paucis albis tectis etiam tomento Havido in parte 



