39 



Cacti.— Orcutt. 



40. 



K^%^ 



MAMMXIiLARIA MiBIACANTHA Engelm. 



MAMMILDA'RIA MA0R0MEKI3 Engelm. 



MAMMILiLAKIA PECTIXATA Engelm. 



# 



MAM'MILbARIA BOCASANA Poselg. 



MAMMILLARIA LASIACANTHA Engelm. 



MAMMILLAUIA WRIGHTII Engem. 



