SELECT SPECIES. 



23 



M. PUSILLA, DecandoUe. — A diminutive but beautiful plant, meriting a 

 place amongst the best forms of the genus. It is interesting, too, as being a 



Fig. 3. — Mamillaria pectinata. 



natire of the West Indies and South America, whence it was introdnoed in 

 1820. This species appears to be identical with those described by Harvey 



