ISO PROCEEDINGS OF THE AMERICAN ACADEMY. 



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

 3.5 ram. diametro tomento brevi tectis ; spiiiis 20-25 in ladiales et cen- 

 trales non distributis rectis pungentibus maximo 4.5 cm. longo ; Horibus 

 circa 10-11 cm. longis ; ovario tereti S(]uamato ; squamis sparsis 1-1.5 

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

 ornato ; lobis exterioribus subspathulatis 3 cm. longis apice eroso- 

 denticulatis, interioribus brevioribus angustioribus acuminatiscpie ; 

 staminibus prope faucem perigonii affixis 2 cm. longis ; stilo liorem 

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

 duro strato exteriori pertirmo ovoideo acuto fiore marcido coronato 7 cm. 

 longt) 3 cm. diametro ; seminibus baud numerosis (ovulis plurimis 

 abortivis) disciformibus 1 mm. diametro nigris lucidisleviter foveolatis." — 

 Albemarle Isl. : Pt. Christoplier, Snoclgrass & Heller, nos. 933 

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

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

 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.]. Endemic. 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. Mas. d'hist. nat. Paris, 1899, p. 312 

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

 factorily described. 



Opuxtia, Raf. 



O. GALAPAGEiA, Hcnsl. Mag. Zool. & Bot. i. 4G7, t. 14, f. 2 (1837) ; 

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

 ser. 3, xxiv. (1898), p. 2G5, 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 Exp., 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. 



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 

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

 culis editis capillis paucis albis tectis etiam tomento flavido in jjarte 



