508 CACTACEA. 
Var. 0. coniflora, Salm Dyck, loc. cit. 
Var. e. Curvispina, Salm Dyck, loc. cit. 
Var. Z. nitens, Salm Dyck, loc. cit. 
Mexico, in warm regions only (ex Forster). Hort. Kew. 
Pfeiffer (Enum. Diag. Cact. p. 28) has a var. 8. prolifera; and he also refers M. pul- 
chella, Hort. Berol., hither, whereas Labouret retains it as a distinct species. 
62. Mamillaria divergens, DC. Rev. Cact. p. 113. 
Mexico, without locality (Coulter). 
63. Mamillaria dolichocentra, Lem. Cact. alig. Nov. p. 3; Icon. Cact. fase. ii. 
Mamillaria longispina, Reichenb. 
Mamillaria obscura, Scheidw. 
Mamillaria stenocephala, Scheidw., ex Labour. Cact. p. 50. 
South Mexico, neighbourhood of Jalapa, on the Rio ‘Grande, and in the Barrancas — 
of Mestitlan (Ehrenberg). Hort. Kew. 
64. Mamillaria dyckiana, Zucc. in Pfeiff. Enum. p. 26. 
Sourn Mexico, near Zimapan and Ismiquilpan (ex Forster). 
65. Mamillaria eborina, Ehrb. in Otto & Dietr. Allg. Gartz. xvii. p. 309; 
Walp. Ann. ii. p. 679. 
MExIco. 
66. Mamillaria echinata, DC. Mém. Cact. p. 3. 
Mamillaria echinaria, DC. Rev. Cact. p. 110? 
Mawillaria densa, Link et Otto, Ic. t. 85, ex Pfeiff. Enum. p. 6. 
Sout Mexico, near Las Ajuntas, on the Montezuma river (Ehrenberg). Hort. Kew. 
67. Mamillaria echinocactoides, Pfeiff. in Otto & Dietr. Allg. Gartz. viii. 
p- 281; Walp. Rep. ii. p. 299. 
Mexico (Ehrenberg). 
68. Mamillaria echinus, Engelm. Cact. U.S. et Mex. Bound. Surv. p. 13, t. 10. 
Trxas.—Nort Mexico, from Presidio del Norte to Santa Rosa (Bigelow). 
69. Mamillaria ehrenbergii, Pfeiff. in Otto & Dietr. Allg. Gartz. vi. p. 274. 
South Mexico, Mineral del Monte (Ehrenberg). | 
70. Mamillaria elegans, DC. Rev. Cact. p. 111. 
Mamillaria supertexta, Hort., nec Mart., ex Pfeiff. Enum. p. 25. | 
SourH Mexico, without locality (Coulter), near Yavesia, Oaxaca. 
71. Mamillaria elongata, DC. Rev. Cact. p. 109. 
Soura Mexico, without locality (Coulter), Zimapan (Ehrenberg). Hort. Kew. 
Salm Dyck (Cact. ed. 2, pp. 12, 100) refers I. subcroced, 1 DC., and M. intertexta, 
DC., to this species. | 
