39 



Cacti.— Orcutt. 



40 



MAMMTELARIA MEIACANTHA Engelrn. 



m 



MAMMILDARIA MAOR0MERI3 Engelm. 



3VLAMMIHLARIA PECTIN ATA Engelm. 



MAMMIDDARIA EOCASANA Poselg. 



^■%W 



% ' ' .'I .'■'"''■■ 





f/f 



MAMMIDDARIA DASIACANTHA Engelm. 



MAMMILDARIA WRIGHTII Engelm. 



