60 



No. 4.-GARDEN ROLLERS. 



For Walks or Lawns, with balance handle. These machines are 

 made in two parts and are much less liable to breakage than the single 

 cylinder roller. 



129.-ACACIA SPADICIGERA, Cham. & Schlecht. 



Known under this name, is a plant which bears curiously 

 curved spines, produced in pairs. The plant is also known under the 

 name of Acacia cornigera, Willd. The spines produced in pairs, 

 resemble very much the different forms seen in the horns of various 

 breeds of cattle. 



Dr. Morris in his book on British Honduras states : — " The 

 " spines on examination are found to be hollow, and probably have 

 " been excavated by a colony of small ants which have established 

 " themselves there. Critically noticed, a small aperture is seen on 

 '* the side near one end of a horn through which the ants pass in and 

 " out. The other horn though holloAv, has no aperture on the outside 

 " and as the inside partition between the two horns has been removed 

 " the ants have snug quarters which can very easily be defended. 

 " During the wet season these holes are filled with ants which keep 

 " guard over every portion of the plant especially against the aggres- 

 " sions of the leaf-cutting ants." 



" As the " Cockspur" being an acacia has numerous glands 

 " frequented by the ants — they are not only securely housed but also 

 " provided with a bowntiful supply of food." 



