CACTACEE. 503 
7. Mamillaria affinis, DC. Mém. Cact. p. 11, t. 6. 
Mamillaria cataphracta, Mart., ex Pfeiff. Enum. p. 11. 
Mexico (Coulter). 
8. Mamillaria alpina, Mart. Act. Acad. Monac.,ex Salm Dyck, Cact. ed. 2, p. 79. 
Sout Mexico, Oaxaca (Karwinsht). 
9. Mamillaria amabilis, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 326. 
MExico. | 
10. Mamillaria anguinea, Otto, ex Salm Dyck, Cact. ed. 2, p. 101. 
Mexico, between Zimapan and Toliman, at Las Ajuntas, on the Montezuma river 
(Ehrenberg). 
11. Mamillaria (Anhalonium) areolosa, Lem. Ill. Hort. vi. Mise. p. 39. 
_ Mexico. 
12. Mamillaria argentea, Fennel in Otto & Dietr. Allg. Gartz. xv. p. 65; 
Labour. Cact. p. 54. 
Mexico ? 
13. Mamillaria atrorubra, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 326. 
MEXIco. 
14. Mamillaria atrosanguinea, Ehrb. in Otto & Dietr. allg. Gartz. xvii. p. 270. 
MEXIco. 
15. Mamillaria aulacantha, DC. Rev. Cact. p. 113. 
MExico, without locality (Coulter). 
16. Mamillaria aulacothele, Lem. Cact. alig. Nov. fase. i. p. 8. 
MExico. 
Var. 6. Sulcimamma, Pfeiff. in Otto & Dietr. Allg. Gartz. vi. p. 274. 
Mexico. | 
17. Mamillaria aureiceps, Lem. Cact. alig. Nov. p, 8; Linnea, xix. p. 346. 
Mexico, collected in 1843 near the Rancho del Sabino, 7000 feet, with long or short 
straight or curved, bright- or deep-yellow spines (Ehrenberg). Hort. Kew. 
18. Mamillaria auricoma, A. Dietr. in Otto & Dietr. Allg. Gartz. xiv. p. 308. 
MEXxIco. 
19. Mamillaria aurorea, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 303. 
MEXxIco. 
20. Mamillaria barbata, Engelm. in Bost. Journ. Nat. Hist. vi. p. 21; Synops. 
Cact. U.S. &c. p. 5. . | 
Norra Mexico, near Cosiquiriachi, Chihuahua (ex Engelmann). 
