516 Oo CACTACEX. — 
153. Mamillaria nivea, Wendl. Cat. Hort. Herrenh. 1835. 
Mamillaria toaldoe, Lehm., ex Walp. Rep. i. p. 289. 
Mexico. Hort. Kew. 
154. Mamillaria nobilis, Pfeiff. in Otto & Dietr. Allg. Gartz, viii. p. 282; 
Walp. Rep. ii. p. 302. 
Mamillaria bicolor, B. nobilis, Férst. 
‘Mexico. Hort. Kew. 
155. Mamillaria nuda, DC. Prodr. iii. p. 460. 
MEXIco. 
156. Mamillaria obliqua, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 250; 
Walp. Ann. ii. p. 675. 
MEXICO. 
157. Mamillaria obvallata, Otto in Otto & Dietr. Allg. Gartz. xiv. p. 308. 
MEXICco. 
158. Mamillaria octacantha, DC. Rev. Cact. p. 113. 
Mexico, without locality (Coulter). | 
Pfeiffer (Enum. Cact. p. 23) reduces this and WM. aulacantha, DC., to M. lehmanna, 
Hort.; and Salm Dyck (Cact. ed. 2, p. 19) refers them and several others to U. macro- 
thele, Mart., a later name. | 
159. Mamillaria odieriana, Lem. Cact. Gen. et Sp. Nov. Hort. Monv. p. 86. 
Sour Mexico, near Acholoya, beneath oak trees, at 6500 feet (Ehrenberg). Hort. 
Kew. 
160. Mamillaria ottonis, Pfeiff.in Otto & Dietr. Allg. Gartz. vi. p. 274; Salm 
Dyck, Cact. ed. 2, p. 129. 
Sourn Mexico, Mineral del Monte (Ehrenberg). 
161. Mamillaria olorina, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 326; 
Walp. Ann. ii. p. 679. 
MEXICco. 
162. Mamillaria pallescens, Scheidw. in Otto & Dietr. Allg. Gartz. ix. P. 42 
Walp. Rep. ii. p. 294. 
Sour Mexxico, near Tehuacan, above 5500 feet (Galeott:). 
163. Mamillaria parkinsoniil, Ehrb. in Linnea, xiv. p. 375. 
Sout Mexico, near San Onofre, at about 4000 feet, and also in the Mineral del 
Monte, on calcareous rocks (Hhrenberg). Hort. Kew. 
164. Mamillaria pazzani, Steeber, in Bot. Zeit. v. p. 491. 
Mexico. 
