Smithsonian Report, 1908. — Safford. 



Plate 14. 



Fig. 3.— M. (Corypliantha) olephaiitidens. 



Fig. 4. — Mamillaria karwinskiana. 



Fig. .'i. — I'elccyiiliora pectinata 

 (enlarged (5 diameters). 



Fig. ti.— I'i'li'cvpliora aselliiormis 

 (slightly reduced). 



Types of Mamillaria and Pelecyphora. 



