BY J. H. MAIDEN. 511 



It is composed of an unfermentable sugar called Eucalin, which 

 is peculiar to the sap of the Eucalypts, together with a ferment 

 able sugar supposed to be Dextroglucose. The manna is derived 

 from the exudation of the sap, which "drying in the hot parched 

 air of the midsummer, leaves the sugary solid remains in a 

 gradually increasing lump, which ultimately falls off, covering the 

 ground in little irregular masses" (McCoy). This exudation of 

 the sap is said by McCoy to take place from the boring of the 

 " Great Black or Manna Cicada " fC. mcerens). 



The Hon. William Macleay of Sydney, is however, by no 

 means of that ojnuion, as he thinks it cannot be doubted that the 

 manna is the work of a gall-making Coccus. 



The subject requires clearing up, and it is to be hoped that a 

 naturalist will give his earnest attention to the mattei\ 



South Australia, Tasmania, Yictoria and New South Wales. 



82. EucHEUMA SPECIOSUM, J. Agarclh, (Syn. Gigartina s2')eciosa, 



Sond.), N.O. Algse, Plate LXiv. Harvey's Phycologia 

 A ustralasica. 



"Jelly-plant" of Western Australia. 



This is a remarkable sea-weed of a very gelatinous character 

 which enters into the culinary arrangements of the people of 

 Western Australia for making jelly, blanc-mange, &c. Size and 

 cement can also be made from it. It is cast ashore from deep 

 water. 



Coast of Western Australia. 



83. Eugenia JaxMbolana, Lavi., (Syn. E. Moorei, F.v.M. ; 

 Syzygium Jambolanum, DC), N.O. Myrtacese, B.M. iii , 

 283. E. Moorei in Muell. Cens., p. 59. 



" Dnrobbi " of the aboriginals. 



The fruit is much eaten by the natives of India ; in appearance 

 it resembles a damson, has a harsh but sweetish flavour, some- 

 what astringent and acid. It is much eaten by birds, and is a 

 favourite food of the large bat or flying- fox (Brandis). 



New South Wales and Queensland. 



f 



