

author, so far as I can find, who has noticed it. His 

 description, indeed, seems to have been drawn up from a 

 young specimen " four inches high, and three inches and 

 a half in diameter, with the mammillae and acnleae small 

 in proportion;" and the flowers were, probably, unknown 

 to that author, since he does not mention them. It is a 

 native of Mexico, but by whom introduced to Europe I do 

 not learn. It flowers in July. 



Descr. Our plant is of a subglobose form, a little elon- 

 gated, flattened at the top, nearly a span high, and a little 

 less in diameter, everywhere externally formed of numer- 

 ous mammilla of a conical or pyramidal form, but some- 

 what angular, between half and three quarters of an inch 

 long, and about as broad at the base, terminated with a 

 depression, from which arise four spreading aculel, longer 

 than the mammillae, moderately strong, between setaceous 

 and subulate, at first brown tipped with a darker colour, 

 then paler, at length almost white : these are about three- 

 quarters of an inch in length, but the two lateral ones are 

 frequently the shortest. The axillae between the mammillae 

 are occupied by a dense mass of white wool, as are the 

 apices of the young mammillae. Flowers numerous, small, 

 from the axils of the mammillae, crowded about the de- 

 pressed portion of the plant, bright full rose-colour, paler 

 in the disk. 



Fig. 1. Front view, and f. 2, side view of the Spines : slightly magnified. 



