394 J. H. MAIDEN AND H. G. SMITH. 
Acacia Maideni, F.v.M.; Leguminose. 
Albizzia pruinosa, Benth.; Leguminose. 
Kinos. 
Eucalyptus hemastoma, Sm., var. micrantha, Benth. ; Myrtacex, 
Eucalyptus Planchoniana, F.v.M., Myrtacez. 
Schizomeria ovata, Don, Saxifragew, 
Gum-resin. 
Medicosma Cunninghamii, Hook. f.; Rutaceze. 
GuMs. 
Bosistoa sapindiformis, ¥.v.M. (N.O. Rutacez). 
Collected at Mullumbimby, Brunswick River, N. 8. Wales. 
This gum, which is transparent and pale coloured, does not 
wholly dissolve in water, although a large percentage goes into 
solution after some time ; this is arabin. The insoluble portion 
dissolves in a dilute alkaline solution, which becomes yellowish in 
colour ; this is precipitated as arabin, thus the insoluble portion 
consists of metarabin. There is no difference in the physical 
characteristics of this gum and those of the other Rutaceous gums 
described in this paper. Resin is absent. The amount of this 
gum at our disposal was not large, so that it was not possible to 
make further inquiries respecting it. 
Gevjera Muelleri, Benth. (N.O. Rutacee). 
“ Axe-breaker.” 
Collected at Lismore, N. S. Wales. 
This gum is in large tears of a light amber to light brownish 
colour, transparent, with a very bright fracture. It is brittle, 
and although somewhat tough, powders fairly well. The fine 
powder, when placed in cold water, does not readily dissolve, nor 
does much more go into solution on boiling. The aqueous solution, 
when separated from the insoluble portion, has fairly adhesive 
properties, although the viscosity is not very high. 
The insoluble portion when treated with dilute soda solution 
becomes yellowish and darkens slightly. On continued gentle 
heating the whole slowly goes into solution. ‘The soluble portion 
