( 461 ) 



Var. contracties. 



Caule minore, areolis approximatis, spinis quam in typo 

 minoribus. 



Ex horfco Ultrajectino rautuatus est v. cl. N. W. P. Rau- 



WENHOFF. 



M. microcephalus Miq. 



Var. olivascens. 



A typo differt colore caulis obscuriore et spinarum mox 

 olivaceo, areolis aliquanto magis tomentosis et spinis tenui- 

 bus naccidis. 



Specimina ad describenduni niutuati sunt v. spectatiss. 

 C. W. R. Scholten et v. clar. N. W. P. Rauwenhoff. 



