CACTACEZ. 529 
6. Echinocactus anfractuosus, Mart. in Pfeiff. Enum. p. 63. 
Sout Mexico, near Pachuca (Karwinski). Hort. Kew. 
7. Echinocactus arachnoideus, Scheidw. in Bull. Acad. Brux. vi. p. 4. 
— Mexico. 
8. Echinocactus arrigens, Link in Otto & Dietr. Allg. Gartz. viii. p. 161; 
Pfeiff. et Otto, Abbild. ii. t. 27. a 
Echinocactus xiphacanthus, Migq. in Linnza, xii. p. 1? 
Mexico, Zimapan (Ehrenberg). 
9, Echinocactus aulacogonus, Lem. Cact. aliq. Nov. Hort. Monv. p. 14. 
Mexico? Hort. Kew. 
10. Echinocactus bicolor, Galeotti in Pfeiff. & Otto, Abbild. ii. t. 25; Labour. 
Cact. p. 259 ; Engelm. Cact. U.S. et Mex. Bound. Surv. p. 27. | 
Txxas.—Nortu Mexico, Chihuahua (Potts). First introduced into Europe by Galeotti, 
but the habitat not recorded. Hort. Kew. 
11. Echinocactus brachycentrus, Salm Dyck, Cact. ed. ii. p. 160. 
Mexico. | 
12. Echinocactus ? cereiformis, DC. Rev. Cact. p. 115. 
Mexico, without locality (Coulter). 
13. Echinocactus chlorophthalmus, Hook. Bot. Mag. t. 4373. 
Mexico, Real del Monte (ex Hooker). 
14. Echinocactus concinnus, Hook. Bot. Mag. t. 4110. 
Mexico? 
14*. Echinocactus conothelos, Regel et Klein, Ind. Sem. Hort. Petrop. 1860, 
p. 48. 
Mexico (Karwinskt). 
15. Echinocactus coptogonus, Lem. Cact. Gen. et Sp. Nov. p. 87; Icon. Cact. 
iii. t. 1; Pfeiff & Otto, Abbild. ii. t. 19. . 
Echinocactus interruptus, Sch. 
Nortu Mexico, La Concepcion, San Luis Potosi (Ehrenberg); Sourn Mexico, Mineral 
del Monte (ex Pfeiffer & Otto), in the plains near Pachuca (Ehrenberg). 
16. Echinocactus cornigerus, DC. Rev. Cact. p. 36, t. 7, et Mém. Cact. t. 10. 
South Mexico, between the city of Mexico and Pachuca (Ehrenberg), Mount 
Zacualco near Guadalupe, valley of Mexico (Bourgeau, 1183); GuatemaLa (ex De 
Candolle). 
17. Echinocactus corynodes, Hort. Berol., ex Pfeiff. Enum. p. 55; Bot. Mag. 
t. 3906. 
BIOL, CENT.-AMER., Bot., Vol. 1, August 1880. 3y 
